Quality Park® Survivor® Tyvek® Expansion Envelopes, Open Side, 12″ x 16″ x 4″, Self-Adhesive, White, Box Of 50

Strong material won’t rip, tear or puncture

• Expand to allow for easy insertion of bulky items like books, binders, catalogs, etc.
• Lightweight to help you save on postage — try these instead of a heavy box or carton. Made from lightweight Tyvek material.
• Grip-Seal® closure secures contents inside.
• Open End means the opening is on the smaller side of the envelope. Open Side means that the opening is on the longer side of the envelope — for an even larger opening.