Carstens 4-Inch Heavy Duty 3-Ring Binder - Side Opening, Ash Gray

Carstens Heavy Duty Ring Binders are made from premium Copolymer Polypropylene plastic to resist tearing and bending in even the most demanding work environments. The No-Gap steel rings are engineered to hold tight, prevent gaping and stay aligned. The 4-inch ring models hold up to 600 sheets. Our non-porous binder surface is impenetrable to air and liquids, so bacteria cannot grow beyond the surface - versus standard vinyl binders that can absorb liquids and harbor bacteria.