Eco-friendly, D-ring binder is made with a high percentage of post-consumer material, contains no VOCs & is 100 percent recyclable. D-rings hold more sheets than round rings for greater capacity in the same-size binder. Durable, Elements three-ring binder is built for long-lasting performance & resists heat-warping & cold cracking. Heavy-duty rings with boosters withstand repeated use. Open & close triggers allow easy access to your letter-size documents. With a 1 capacity, binder holds up to 225 sheets. Binder also features exposed rivets. "