Tabloid Size: These plastic binding covers have obtained the certificate of quality from UL. 11 x 17 Inches leather textured plastic covers. Pack of 20. Sand & Leather Textured: Plastic binding back covers are designed with a leather-texture on one side, and a sand-texture on the reverse. (Attention: leather-like appear, not made from leather) 16 Mil Polycovers: Each binding cover is made of 16mil (400mic) of Polypropylene material. These poly covers are sturdier, protecting your documents from creases and robust enough to withstand frequent handling. Square Corners: Flush cut square corners give your work a neat presentation and they're water-proof and tear-proof to keep your papers clean. Unpunched for Easy Use: Unpunched binding presentation covers can be used with any binding spine, in any binding style that suits your needs. Work with any binding system (except thermal). They are well-suited for use in school offices or at home, making them a great gift for teachers, students, and colleagues. Sand & Leather Textured: Plastic binding back covers are designed with a leather-texture on one side, and a sand-texture on the reverse. (Attention: leather-like appear, not made from leather)