Cardinal EcoSmart Ring Reference Binders are molded with 90 percent recycled polypropylene that’s 100 percent recyclable. This means no disassembly is required to recycle this binder. The cover and rings are guaranteed 5 years not to crack or break. Cardinal EcoSmart Ring Reference Binders feature heavyweight construction with a “living hinge” that is cold-crack tested to 10 degrees Fahrenheit. The one touch trigger opens its split-ring design for no-gap page turning and easy loading. EcoSmart’s ergonomically shaped spine provides easy shelf removal. EcoSmart Ring Reference Binders feature an oversized label holder on the spine for easy identification. Non-stick and archival-safe, each EcoSmart Ring Reference Binder has a capacity of 2 inches to hold up to 350 letter size sheets. Cardinal Brands Binders offer a professional edge that puts you at an advantage and keeps your projects organized and looking great!