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Best Choice Faber-Castell 
Faber-Castell 0.5mm 2B Mechanical Pencil Refills (96 Leads, 4 Tubes of 24 Leads Each) Faber Castell, premium, high quality, strong, smooth and dark. Work with any 0.5 mm lead mechanical pencilsUni-Ball 
72 x Uni-Ball Kuru Toga Nano Dia 0.5mm HB Mechanical Pencil Refill Leads (6 Packs) STAEDTLER 
Staedtler Lead Refills Mech.Pen.Lead Mars Micro, leads 0.7mm, Tube of 12 (250 07-HB) 0.7mm Mechanical pencil lead for use on paper and drawing cardBest Value Pentel 
Pentel Ain Stein Lead Refills 0.5mm Assorted Grades HB H B 2B, 4 Tubes of 40 Leads, Total of 160 Assorted Grade Leads (Y AIN STEIN lead has achieved dramatic strength without sacrificing darkness and smoothnessFaber-Castell 
Faber-Castell 0.7mm 2B Super Polymer Premium Strong Dark Smooth Leads Mechanical Pencil Lead Refills For All 0.7 mm Mech Hardness : 2B Grade, Diameter : 0.7 mm, Length : 60 mSTAEDTLER 
Staedtler 3H Mars Micro Mechanical Pencil Lead Refills, 0.5mm Lead Sized Stable and break resistant三菱鉛筆 
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