These 6" x 9" Loc N' Pres Press-On Adhesive Backed Reclosable Ziplock Envelope Bags are great for documents like shipping information, job tickets or shipments of small parts! 6 x 9 Press-on Adhesive Zipper Bags are also excellent for work-in-progress projects where papers are frequently removed, checked, and returned to the zipper bag. These 6 x 9 .002 Press-on Envelopes have a pressure-sensitive adhesive backing that sticks to most surfaces. Our 6in. x 9in. 2 mil Press-on Ziplock Bags or stick on reclosable bags, which keeps out moisture, dirt and other contaminats and are made from sturdy 2 mil poly film.