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 tested for over 50,000 uses right in our manufacturing facility to ensure they hold tight and stay aligned. The silver “Narcotics Control” lettering is hot-foil stamped directly into the plastic covers for a clear, vibrant look that won't peel or wear like traditional sticker labels. The 2-inch ring models hold up to 300 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. This unique cover material ensures easy cleaning and disinfecting – ideal for frequent use in busy healthcare environments. Carstens Heavy Duty Ring Binders are built tough to get the job done for the long haul with a 3-year warranty on the rings and covers. For over 130 years, Carstens has been the choice of the pros, setting the standard for quality and durability in products for healthcare facilities and beyond. We're proudly made in the USA of US and imported parts, and a WBENC certified Woman-Owned Small Business.