Eco-friendly storage binder features removable rings that make the binder 100 percent recyclable. Sturdy chipboard core is made from recycled material, and the acid-free polypropylene is environmentally safe. A portion of the proceeds from each binder purchased will be donated to American Forests to help plant a minimum of 7,500 trees annually. Two inside pockets offer extra storage for loose documents. Locking metal round rings are mounted to the back to reduce wear and let letter-size pages lie flat. 1-1/2" capacity holds approximately 350 sheets. Binder also features exposed rivets.