Business Source - BSN28444 Basic D-Ring View Binder offers a clear, nonglare overlay on the front, back and spine for easy customization and identification. Slant-D rings hold 25 percent more paper than traditional binders. Back-mounted metal rings allow pages to lie flat. Two triggers on the ring mechanism provide easy access to your documents. 4" capacity holds up to 835 letter-size sheets. Clear pockets on the inside covers offer extra document storage with a 30-sheet capacity for each pocket. Design also features a sturdy chipboard core and exposed rivets. Three-ring binder is made of polypropylene.