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Best Choice Quality Park 
Quality Park Interoffice Envelopes, String and Button, Brown Kraft, 10 x 13, 100 per Case, (63561) DURABLE: Made from heavyweight 28 lb. paper stockSutter Signs 
Interoffice Envelopes with String, 10" x 13" String Tie Interdepartmental Envelopes, Sturdy 100gsm Paper (Pack of 100) SECURE STRING TIE CLOSURE | Designed for reliable internal delivery, these inter office envelopes with string feature aBest Value Quality Park 
Quality Park 2-Side Interoffice Envelopes, Redi-Tac Box-Style, Brown Kraft, 10 x 13, 100 per Box, (63666) REDI-TAC: Unique redi-tac closure is durable and convenientQuality Park 
Quality Park 10 x 13 Interoffice Envelopes, with Reusable Redi-Tac Self Seal Closure, for Interoffice Mail, Heavyweight These 10x13 interoffice envelopes with a self seal Redi-Tac closure are reusable, fast & thrifty; made of heavyweight 32LION 
Lion File-N-Send Poly Inter-Office Envelopes, 10 x 13 Inches, Clear, 6 EA/Pack, 1 Pack (22700-CR) 10 inch x 13 inch/clearLION 
Lion File-N-Send Poly Inter-Office Envelopes, 10 x 13 Inches, Opaque Charcoal Gray (Black), 6 EA/Pack, 1 Pack (22700-CG) 10" x 13"Quality Park 
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Designed to be sent using a single Large Letter 1st Class orQuality Park Quality Park Inter-Department Envelopes, String-and-Button, White, 10 x 13, 100 per Box, (63663) SECURITY TINTED: Have ease of mind that your contents are secure with the security tintingCardinal bag supplies Cardinal bag supplies Interoffice Transit Mailbag, Canvas Envelope,14x11 (Gray) Durable Canvas Material: Crafted from high-quality thick non-tear canvas fabric for long-lasting use in various environmCardinal bag supplies Cardinal bag supplies Interoffice Canvas Mailbag, Transit Envelope, Mailer Pouch, 18 x 14 inch (Gray) Durable Canvas Material: Crafted from high-quality thick non-tear canvas fabric for long-lasting use in various environmQuality Park Quality Park 9 x 12 Clasp Envelopes, Clasp and Gummed Closures, Red, 10 per Pack (QUA38734) Reusable.Loopunk Loopunk 10 Pack Manilla Envelopes Clasp Envelopes, Kraft Paper File Bags, with Button and String Closure, for Office, Ho Approximate Dimensions: 13.4”L x 9.3”H. 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