The 50-pack of 4.0 x 2.5" Peel-Stik Polypockets from Lineco identify, protect and organize items using clear archival polypropylene adhesive-backed pockets. They are available in many sizes for different applications including holding index cards, photos, sports cards, and business cards, or to add a pocket to the inside of a binder, album or journal. The 4.0 x 2.5" pocket offers a 4.0" opening side to fit standard business cards. The application is easy and fast, just peel off the backing to reveal adhesive and stick where desired. The polypropylene is safe, will not discolor, and is durable for both short and long term storage. This pack contains fifty 4.0 x 2.5" adhesive pockets.