These 4″ x 6″ Loc N’ Press On Adhesive Backed Resealable Zipper Locking Envelope Bags are great for documents like shipping information, job tickets, or shipments of small parts. 4 x 6 stick on re-closable bags are also excellent for work-in-progress projects where papers are frequently removed, checked, and returned to the zipper bag. These 4 x 6 .002 plastic bags with adhesive have a pressure-sensitive adhesive backing that will stick to most surfaces. Our 4in. x 6in. 2 mil Press-on Zipper Locking Bags or stick on reclosable shipping bags, which keeps out moisture, dirt and other contaminates and are made from sturdy 2 mil poly film.