Five Star 2 Inch Zipper Binder, Expanding Pocket, Durable, Purple (73303) Lasts All Year. GUARANTEED!* Durable zipper binder is made of water resistant materials. Expanding pocket with a secure bottom allows you to store textbooks, notebooks and other supplies on the outside of the binder. Combined sheet capacity of 580 sheets in this 2 in. binder Interior 5-pocket expanding file provides convenient and organized storage for up to 200 loose papers. 3-ring fixture holds up to 380 letter size sheets