Overview Material : Plastic Brand : Binditek Color : BLACK , 50 PACK Item Weight : 1.1 Pounds Installation Type : Binding About this item 50 Pack: These binding covers have obtained the certificate of quality from UL. 8-1/2" x 11", perfect for letter size. 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 Polycover: Each binding cover is made from 16mil (400mic) Polypropylene material, heavyweight. 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 persentation clean. Unpunched for Easy Use: Unpunched binding covers can be used with any binding spines, in any binding style that suits your needs. Work with any binding system (Attention: Except Thermal). They are well-suited for use in school offices or at home, making them a great gift for teachers, students, and colleagues.