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Best Choice AUTOOL New
AUTOOL HVAC Gauges Refrigerant Recovery Machine, HVAC Automotive Recovery and Recharge of R134, Built in Compressor/Filt 【Support 95 Refrigerants】AUTOOL LM160 AC Gauge Set has a built-in 95 refrigerant pressure temperature database. PressureBest Value Dynamic Power New
Dynamic Power HB-AS186 1/6HP Air Compressor 20-23L/Min. with 3 litres Tank Product Type: Outdoor LivingAUROLYNNE New
AC Compressor with Clutch Fits for Subaru Forester 2014-2018 2.0L 2.5L Impreza 2012-2016 2.0L WRX 2015-2020 2.0L Replace Function: The main functions of automobile air-conditioning compressors are as follows: compressing refrigerant: increasGERCHWAY New
Tire Inflator with Pressure Gauge and Longer Hose - Most Accurate, Heavy Duty Air Chuck with Gauge for Air Compressor Ti The tire inflator with pressure gauge is built of sturdy materials to guarantee you LONG-LASTING PERFORMANCE. The tire pP PBAUTOS New
P PBAUTOS 3/4HP Single Cylinder Refrigerant Recovery Machine, 220V 50Hz Portable Oil-less Freon Recycling Unit for Both Outstanding Design: The refrigerant recovery machine mainly is installed with a 220 V 50 Hz single cylinder, a 3/4 HP poele ELEOPTION New
Single Stage Rotary Vane Vacuum Pump 1.5L 220V High Pressure Air Pump Electric Air Compressor for HVAC Air Tool Auto AC Single-Stage Rotary Vane Vacuum Pump High Efficiency and Low Noise, Heavy-duty Aluminum Alloy Casing, Oil Drain Plug PosX AUTOHAUX NewX AUTOHAUX Oil and Dye Injectors Kit 30ml/1 Oz Hand Push Compressor Manual AC Oil Dye Injector with Quick Coupler 1/4 SA [Function of Oil & Dye Injector] 30ml Push-in type filter, one shot may help and rescue a bad compressor which caused byMotorcraft NewMotorcraft YH-38 A/C Compressor Refrigerant Pressure Switch Part number: YH-38Jectse New90-120PSI Adjustable Air Compressor Pressure Valve Kit with Switch, Regulator and 2 Gauges for Easy Control and Clear Di ADJUST PRESSURE: Rugged and durable, mainly used to adjust the starting pressure and closing pressure of air compressorsVEVOR NewVEVOR Air Compressor 6.6 Gallon, Portable Air Compressor 1 HP, Oil Free Air Compressor Steel Tank 750W, Pancake Air Comp 6.6 Gallon Air Compressor: The air compressor is equipped with an oilless pump for minimal maintenance and a 25 L tank fJIFETOR NewJIFETOR AC Charge Hose with Gauge, Car R134A Refrigerant Recharge Kit, Auto Air Conditioning U Charging Hose Low Pressur AC U Charge Hose: R134A charging hose uses rubber nylon resin material hoses, featured with anti-corrosion, low fluid reYHNNH NewAC Refrigerant Gas Recovery Unit/Machine Compatible For Car Air Conditioning With R32 1234yf Compressor 1 HP RR500 Black Wide refrigerant adaptation: This refrigerant recovery machine is specifically designed for automotive air conditioningYHNNH NewCompressor ETA130L Refrigerator Compressor R600 Refrigerant Refrigeration and freshness: It can quickly reduce the temperature in the refrigerator, so that the food can cool quicklVEVOR NewVEVOR Air Compressor, 8L Steel Tank, 1HP 2.5 CFM 8bar Oil Free Air Compressor & Max. 120PSI Pressure, 81dB Ultra Quiet P 2 Gallon Air Compressor: Our 860W oil-free motor drives the compressor up to a speed of 2800 r/min and 2.5 CFM 8bar airCTJNHZRW NewAC Compressor Electronic Control Valve,Compatible with Skoda Octavia Golf Polo Crafter 5q0820803k The control valve precisely regulates the flow of refrigerant to ensure that the automobile air conditioning system coolVEVOR NewVEVOR Vacuum Pump 4CFM 1/4HP Air Vacuum Pump HVAC A/C Air Refrigerant Rotary Vane Vacuum Pump Single Stage 1 Valve AC Ma High-quality Vacuum Pump: FAD: 4CFM, Single Stage; Power: 1/4 HP; Ultimate Vacuum: 5PA. The vacuum pump has a die-cast aAexit NewAexit -10-85PSI (Control electrical) 1-Port Refrigerants Air Water Compressor Pressure Switch (13ry367qf703) Control Product Name : Pressure Switch;Model NO. : SSNS-106Mbnvtxh New90-120PSI Air Compressor Pressure Switch Valve Control Manifold Regulator Gauges Safety Valve 1/4" BSP Air Compressor Pa [Piston Structure] The flow rate is 30% higher than traditional diaphragm type. Valve body structure has overflow port fGeneric NewR134a Refrigerant Refill Kit, Pressure Gauge Set - Distributor Air Conditioning Hose Pressure Gauge Kit, Car Repair Tool Practical set: This complete kit is ideal for measuring the refrigerant level R134A/R22/R410/R12 and can be used for autKAISAL NewAC Flush Kit Pressure Regulating&Relief Valve AC Cleaner Real-time Monitoring Pressure Gauge AC Cleaning Kit with Spray 【Suitable for Air-conditioning System Cleaning】AC flush kit is suitable for cleaning all air-conditioning systems and otAIMALL NewAIMALL 90-120PSI Air Compressor Pressure Switch Control Valve Manifold Regulator Gauges, 240V 20A, Auto Control 🛠 Automated Control System: Effortlessly manage your air compressor's operation with our advanced 90-120 PSI pressure sXYusuf NewAC Flush Kit Pressure Regulating&Relief Valve AC Cleaner Real-time Monitoring Pressure Gauge AC Cleaning Kit with Spray 【Suitable for Air-conditioning System Cleaning】AC flush kit is suitable for cleaning all air-conditioning systems and otAexit NewAexit SNS-C130X (Control electrical) 30Kg 1-Port Refrigerants Air Water Compressor Pressure Switch (69ry751qf565) Contro Product Name : Pressure Switch;Model NO. : SNS-C130XCMTOOL NewAC Oil and Dye Injector Tool with Scale, R134A Compressor Oil Injector Kit, Automotive Car A/C Kit with Snap Quick Coupl 【Markings Etched Instead of Stickers】The capacity of the automotive ac oil injector is 1/4oz--2oz (7.5ml--60ml). The meaHYCHILL NewHyChill Minus 30 Low GWP Hydrocarbon Refrigerant 425g can with Valve and Hose Kit Replaces R12, R134a and R1234yf in car AC and other R12-R134a systemsNOLITOY NewNOLITOY 2pcs Aluminum Air Compressor Adapter with Precision Pressure Detachable Refrigerant Coupler for Car Air Conditio Optimized sealing structure: designed with an advanced sealing mechanism to maintain system stability, reducing refrigerVEVOR NewVEVOR Air Compressor, 8 Gallon Steel Tank, 1HP 2.2 CFM@90 PSI Oil Free Air Compressor & Max. 120PSI Pressure, 80dB Ultra 8 Gallon Air Compressor: Our 650W oil-free motor drives the compressor up to a speed of 3300 r/min and 2.2 CFM@ 90 PSI a NewRefrigerant Charging and Service Procedures for Air Conditioning: A Beginner’s Guide to Safe Refrigerant Handling, Syste Aexit NewAexit Refrigerants (Control electrical) System Air Compressor Pressure Switch Control (26ry753qf504) Valve 75-145PSI Product Name : Pressure Switch;Model NO. : HK-130HYCHILL NewHyChill Minus 30 Low GWP Hydrocarbon Refrigerant 425g can Replaces R12, R134a and R1234yf in car AC and other R12-R134a systemsLICAEVEY NewAir Compressor Pressure Valve Kit, 90‑120PSI Adjustable Pressure, Air Compressor Pressure Switch and Valve Pressure Regu 90‑120PSI ADJUSTABLE: This air compressor pressure switch and valve pressure regulator support automatic control, 120PSIYHNNH Freezing Refrigeration Air Conditioning Refrigerant Circuit Vacuum Negative Pressure Constant Pressure Valve Expansion V Expansion valve adjusts refrigerant flow: According to the operating conditions of the air conditioner, the refrigerantTHB NewAir Pressure Regulator for compressor compressed air 3/4 FREE GAUGE SEWOART NewSEWOART 2pcs Aluminum Air Compressor Adapter for Car Ac Refrigerant Detachable Fittings with Pressure Leak-resistant Con Lightweight and durable: aluminum construction combines lightweight convenience with exceptional durability, ideal for wAupoko NewAupoko AC Oil Injector Kit, R134A Oil Injector with R1234YF Low Side Quick Coupler, HVAC Dye Oil Injector with 1/4" SAE ❄ LARGE CAPACITY ---- A/C Oil and dye injector refrigerant tools with two snap quick coupler, 2 oz Push-in type with 1/4VEVOR NewVEVOR Air Compressor, 40L Steel Tank, 2HP 5.3 CFM@90 PSI Oil Free Air Compressor & Max. 125PSI Pressure, 78dB Ultra Quie 10 Gallon Air Compressor: Our 1.25KW oil-free motor drives the compressor up to a speed of 1400 r/min and 5.3 CFM@ 90 PSVEVOR NewVEVOR Air Compressor, 30L Steel Tank, 1HP 2.2 CFM@90 PSI Oil Free Air Compressor & Max. 120PSI Pressure, 80dB Ultra Quie 8 Gallon Air Compressor: Our 650W oil-free motor drives the compressor up to a speed of 2800 r/min and 2.0 CFM@ 90 PSI aVEVOR NewVEVOR Air Compressor, 4L Steel Tank, 1HP 1.5 CFM 7bar Oil Free Air Compressor & Max. 120PSI Pressure, 68dB Ultra Quiet P 1 Gallon Air Compressor: Our 635W oil-free motor drives the compressor up to a speed of 1400 r/min and 1.5 CFM 7bar airLichamp NewLichamp AC Oil Injector R134A, R1234YF Refrigerant A/C Dye Injector Kit with Adjustable Coupler and Oil Checkers MULTIFUNCTIONAL: Professional automotive air conditioner 134A 1234YF compressor A/C injector kit for injecting oil and dFengda NewFengda FD-18-2 Mini Airbrush Compressor, Powerful Air Flow and Air Pressure, Single-Piston Oil-Free Mini Compressor Equi Professional Airbrush Compressor Kit, Piston Type, Oil Free; Air Pollution, Barometer, Real-time Operating Pressure at aJHIALG NewAutomotive Air Conditioning Refrigerant Oil Analyzer, Refrigeration Oils Regulator, 2025 Car A/C System Compressor Oil F Controlled Impurity Filtration: High-pressure valve opens partially (1/4 turn), while low-pressure valve opens fully toEaglerich NewR134A Compressor Oil Dye Injector with R134A Quick Coupler and Low Pressure Coupler, AC R12 R22 Oil and Dye Injector Ref Widely Application:Suitable for filling up the automobile air conditioning refrigeration system of R134A, R12, R22. LowS-A Design NewHow to Repair Automotive Air-Conditioning & Heating Systems (Workbench) Independently published NewHVAC Quick Diagnostic Guide: Step by Step troubleshooting with pressure, Delta, and Voltage Gatuida NewGatuida 2pcs Detachable Aluminum Air Conditioner Refrigerant Hose Adapter with Pressure Valve Leakproof Air Compressor C Efficient refrigerant flow: integrated with a flow control ball valve, allowing precise refrigerant management for optimsmilfuy Newsmilfuy AC Oil Dye Injector Kit, 30ml/1 Oz Hand Push Compressor Oil Injector Refrigerant Tool with Quick Coupler, Manual 【Function】:The main purpose of this oil dye injector is to monitor leaks. The oil injector is used with fluorescent dyesULTECHNOVO NewULTECHNOVO 2pcs Aluminum Refrigerant Hose Fittings with Pressure Valve Leakproof Air Compressor Straight Coupler for Veh Precision valve control: integrated valve ensures accurate refrigerant flow control, enhancing the efficiency and reliabButterworth-Heinemann NewWater (R718) Turbo Compressor and Ejector Refrigeration / Heat Pump Technology Generic NewA/C Air Conditioning Refrigerant Pressure Sensor 499000-7990 4990007990 The air conditioner pressure sensor is made of metal and plastic, a wear-resistant, lightweight and durable material. WiGeneric NewA/C Air Conditioning Refrigerant Pressure Sensor 499000-7990 4990007990 The air conditioner pressure sensor is made of metal and plastic, a wear-resistant, lightweight and durable material. WiCabilock NewCabilock 2pcs Aluminum Air Conditioner Hose Adapter with Pressure Valve Detachable Straight Refrigerant Hose Connector f Wide application range: compatible with most air conditioner and compressor fittings, catering to various system requireBarbuly NewBarbuly 3Pcs R134A R410A R22 R12 800 Psi Manifold Gauge Set A/C Refrigeration Charging Hose High Pressure HVAC Refrigera Cabilock NewCabilock 2pcs Aluminum Air Conditioner Coupler with Compressor Pressure Valve Adapter Lightweight Durable Straight Refri Versatile connection: high compatibility with various air compressors, making it suitable for diverse repair and maintenSURIEEN NewSURIEEN R1234yf Quick Couplers Adapters, Adjustable Fitting Car Auto AC Compressor, High/Low Side Refrigerant Connector [WIDE COMPATINILITY] ----- This professional high & low quick couplers adapters(6 ball style) fit for R1234yf refrigeranGLEAVI NewGLEAVI 2pcs Aluminum Air Conditioner Adapter with Pressure Leakproof Straight Coupler for Car Ac Refrigerant Charging Qu Wide compatibility: detailed engineered to fit a wide range of vehicle models, simplifying installation for both professGeneric NewAir Conditioning Compressor High Pressure Switch 1676787C1 650204 651379 912-1120 Automotive Sensor Accessories The air conditioner pressure sensor is made of metal and plastic, a wear-resistant, lightweight and durable material. WiSOLUSTRE NewSOLUSTRE 2pcs Aluminum Air Compressor Connector with Built Pressure Valve Wear Resistant Refrigerant Hose Adapter for Ve Precision valve control: integrated valve ensures accurate refrigerant flow control, enhancing the efficiency and reliabGeneric NewSensors Refrigerant Pressure Switch Air Conditioning Pressure Sensor fits for Honda Reliable A/C Performance – Accurately monitors refrigerant pressure to ensure optimal air conditioning system performancSOLUSTRE NewSOLUSTRE 2pcs Aluminum Refrigerant Hose Fitting Detachable Air Compressor Adapter with Pressure Valve for Air Conditione Precision valve control: integrated valve ensures accurate refrigerant flow control, enhancing the efficiency and reliabDECORNIJIA NewDECORNIJIA 10pcs Refrigeration Tools Car Accessories Pressure Gauge Seal Kit for Air Compressor Refrigerant Gauges Broad usability: suitable for multiple air conditioner brands and models, practical for diverse environments including rULTECHNOVO NewULTECHNOVO 2pcs Aluminum Straight Air Compressor Adapter with Built Charging Leakproof Refrigerant Connector for Car Air Leakproof performance: advanced sealing technology prevents refrigerant leakage, reducing environmental impact,air comprParliky NewParliky 2pcs Aluminum Air Compressor Adapter with Pressure Valve Leakproof Refrigerant Hose Fittings for Vehicle Air Con Versatile connection: high compatibility with various air compressors, making it suitable for diverse repair and maintenyztju NewCar AC Refrigerant Charge Hose - R134a AC Recharge Hose, 59 Inches High Pressure Charging | Automotive Air Conditioning Enhanced Convenience: Easily monitor your car's AC charge with our hose, capable of handling 4000 PSI burst pressure andGeneric NewA/C Pressure Switch Sensor for GMC 2003-2021 A/C Condition Pressure Sensor Switch A/C Pressure Sensor Refrigerant Pressu Reliable A/C Performance – Accurately monitors refrigerant pressure to ensure optimal air conditioning system performancVaguelly NewVaguelly 2pcs Air Conditioner Fittings Aluminum Refrigerant Hose Adapter with Pressure Valve Detachable Straight Coupler Quick charging valve: features a builtin charging valve and nozzle for efficient refrigerant refilling, enhancing air coFELTECHELECTR NewFELTECHELECTR 2pcs Detachable Straight Aluminum Hose Coupler with Refrigerant Pressure Valve for Vehicle Air Conditioner Durable aluminum design: crafted with aluminum, the adapter ensures high durability and prevents leaks for extended lifeHYCHILL NewHyChill Minus 30 Low GWP Hydrocarbon Refrigerant – 200g Can with Sealant and UV Dye Replaces R12, R134a and R1234yf in car AC and other R12-R134a systems. No ARC licence requiredNlrlo NewCar AC Refrigerant Charging Hose - R134A AC Charging Hose - 59" High Pressure Charging Line Performance and Durability | Increased Convenience: Easily monitor the AC charging of your car with the hose, handle 4000 PSI burst pressure and 800Happyyami NewHappyyami 2pcs Aluminum Air Conditioner Straight Hose Adapter with Integrated Pressure Valve Leakproof Refrigerant Flow Solid aluminum: lightweight yet stable aluminum construction provides excellent resistance to wear and tear, ensuring loA-premium NewA-Premium A/C Discharge Hose Compatible with Mitsubishi Lancer 2008-2010 L4 2.0L 2.4L High Pressure Compressor to Conden [Vehicle Fitment]: Compatible with Mitsubishi Lancer 2008-2010 L4 2.0L, Lancer 2009-2010 L4 2.4L --- To 06/01/2010Beatifufu NewBeatifufu Air Conditioning Core Quick Remover Tool Low Pressure Compressor Valve Core Installer Durable Car Accessories Core quick installer--don't need to release the refrigerant core changer for the replacement,R134A Core Removal ToolEXAOMBLE NewEXAOMBLE Heavy-duty Pressure Gauge Shield with Transparent Impact-resistant Case Anti-collision Protective Cover for Air Clear visibility: the transparent design offers unobstructed visibility, allowing users to monitor pressure levels efforZestivra NewR134A Refrigerant Adapter - High Pressure Tank Connector, Adjustable HVAC Adjustment | 1/4 Inch Push Tool for Compressor Adjustable design: designed for optimal refrigerant management, R134A adapter fittings ensure precise regulation and impCabilock NewCabilock 2pcs Air Compressor Connector Detachable Straight Coupler Aluminum Refrigerant Hose Adapter with Pressure Valve Advanced valve integration: equipped with a refrigerant pressure valve for controlled charging, ensuring safe and effici NewHVAC Quick Diagnostic Guide: Step by Step troubleshooting with pressure, Delta, and Voltage Generic NewA/C Pressure Sensor for Buick 2003-2018 A/C Air Conditioning Refrigerant Pressure Switch Sensor 7701205751 13587668 The air conditioner pressure sensor is made of metal and plastic, a wear-resistant, lightweight and durable material. WiBUGUUYO NewBUGUUYO 2pcs Aluminum Air Compressor Straight Coupler with Pressure Valve Detachable Refrigerant Hose Adapter for Vehicl Solid aluminum: lightweight yet stable aluminum construction provides excellent resistance to wear and tear, ensuring loLyxheth NewLyxheth AC Pressure Sensor Switch, AC Sensor for Car, A/C High Pressure Switch Air Conditioning Refrigerant Pressure Sen Replace Numbers:This car AC pressure sensor replaces OEM #155884, 1551258, 1551343, 15-51343, 1550147, 13502759, 1358766Mikinona NewMikinona 2pcs Detachable Aluminum Straight Hose Adapter with Pressure Valve for Auto and Truck Air Conditioner Refrigera Leakproof performance: advanced sealing technology prevents refrigerant leakage, reducing environmental impact,refrigeraSOESFOUFU NewSOESFOUFU 2pcs Aluminum Detachable Air Conditioner Hose Adapter with Pressure Valve Lightweight Refrigerant Coupler for Durable aluminum design: crafted with aluminum, the adapter ensures high durability and prevents leaks for extended lifeHYCHILL NewHyChill Minus 30 Low GWP Hydrocarbon Refrigerant 425g can and Valve Replaces R12, R134a and R1234yf in car AC and other R12-R134a systemsSTOBAZA NewSTOBAZA 2pcs Detachable Air Conditioner Straight Adapter with Aluminum Refrigerant Hose Fitting and Pressure Valve for V Versatile connection: high compatibility with various air compressors, making it suitable for diverse repair and maintenGRIRIW NewGRIRIW 2pcs Aluminum Coupler with Flow Control Ball Valve Detachable Straight Refrigerant Hose Adapter for Automotive Ai Quick charging valve: features a builtin charging valve and nozzle for efficient refrigerant refilling, enhancing air coGANAZONO NewGANAZONO 2pcs Detachable Aluminum Air Conditioner Hose Coupler with Pressure Valve Leakproof Vehicle Refrigerant Adapter Leakproof construction: enhanced connector design minimizes the risk of leaks, ensuring easy operation and prolonged sysERINGOGO NewERINGOGO Heavy-Duty Pressure Gauge Shield with Transparent Window Shock-Absorbing Protective Case for HVAC Air Compresso Gauge protector cover: engineered to preventwater ingress, this cover reduces maintenance needs and is ideal for challeniplusmile Newiplusmile 2pcs Aluminum Air Conditioner Hose Adapter with Detachable Pressure Valve Straight Refrigerant Coupler for Veh Wide adaptability: designed to work seamlessly with a variety of air conditioner systems, providing a versatile solutionLOLIPPYY NewLOLIPPYY Heavy-Duty Pressure Gauge Shield with Impact-Resistant Transparent Window Weather-Resistant Protective Case for Efficient installation process: enables quick and easy attachment, reducing downtime and improving productivity,regulatoRoutledge NewRefrigeration Equipment GOOHOCHY NewGOOHOCHY 2pcs Aluminum Air Conditioner Straight with Valve Refrigerant Hose Fitting for Vehicle Auto Truck Multipurpose Advanced valve integration: equipped with a refrigerant pressure valve for controlled charging, ensuring safe and efficiIndependently published NewCompressed Air Dryers BESTYASH NewBESTYASH 2pcs Aluminum Refrigerant Adapter Fittings with Pressure Leakproof Detachable Straight Coupler for Car Air Cond Leakproof construction: enhanced connector design minimizes the risk of leaks, ensuring easy operation and prolonged sysGeneric NewA/C Pressure Switch Sensor for Volvo for C30 C70 S60 S80 XC60 XC70 A/C Compressor Pressure Sensor Switch 31292004 Pressu Installation: This air conditioning pressure sensor is user-friendly and quick to install; the installation process doesLDCRE NewA/C Air Conditioning Compressor Condenser Hose Pipe Assembly, Fits 2015-2020 Chevy Trax 1.4L, 2013-2015 Buick Encore 1.4 Compatible With: This A/C Air Conditioning Compressor Condenser Hose Pipe Assembly is compatible with 2015-2020 Chevy TrGeneric New4921475 OE Car Engine Fuel Rail Pressure Sensor Switch Oil Water Pressure Sensor for Air Compressor Cummins 6Bt Isx Dies Installation: This air conditioning pressure sensor is user-friendly and quick to install; the installation process doescarLLL NewAC Pressure Switch Sensor, for Volvo, for C30 C70 S60 S80 XC60 XC70 A/C Compressor Pressure Sensor Switch 31292004 A/C P 【High Quality】: The air conditioning pressure sensor switch is made of high-quality aluminum and plastic, which is watercarLLL NewCar Air Pressure Switches, for Land, for Rover, for Discovery 3 2005-2009, for Range, for Rover 2003-2009 Air Suspension Car Air Pressure Switches, Fit For Land, Fit For Rover, Fit For Discovery 3 2005-2009, Fit For Range, Fit For Rover 2003Generic NewA/C Pressure Switch Sensor for Chevrolet 2002-2022 A/C Pressure Switch Sensor with Connector 6E5Z19D594AA Air Conditioni The air conditioner pressure sensor is made of metal and plastic, a wear-resistant, lightweight and durable material. WiAmosfun NewAmosfun 2pcs Aluminum Refrigerant Adapter Fittings with Quick Charging Detachable Straight Coupler Air Conditioner Conne Optimized sealing structure: designed with an advanced sealing mechanism to maintain system stability, reducing refrigerCHILDWEET NewCHILDWEET 2pcs Aluminum Air Conditioner Fittings Straight Refrigerant Adapter with Pressure Detachable Coupler for Car A Enhanced cooling efficiency: specially designed to support efficient refrigerant flow, improving overall air conditionerMOLUCKFU NewMOLUCKFU 2pcs Aluminum Straight Hose Adapter with Pressure Valve for Air Conditioner Secure Fitment Precision Refrigeran Precision valve control: integrated valve ensures accurate refrigerant flow control, enhancing the efficiency and reliab