UNDERWRITERS LABORATORIES® (UL®) FIRE & IMPACT RATING on all file cabinets. These models carry the 1-Hour Class 350 Fire with Impact UL label. Tests include 1 hour exterior fire exposure at 1700°F, a 2000°F explosion test, and a 30 foot drop to test impact integrity. FIREPROOF INSULATION is 100% gypsum, reinforced by a 1" by 2" lattice made of 14-gauge galvanized welded steel wire, providing complete peace of mind from fire, impact, or explosion. INSULATION BETWEEN ALL DRAWERS makes each drawer a separate insulated container. WATER RESISTANCE means files are designed to prevent water damage resulting from sprinklers and fire hoses. 2-POSITION DRAWER CATCH allows access to certain drawers while others remain locked. DRAWER HEADS are formed of welded steel and filled with fireproof insulation, and are field replaceable. FINISH is an environmentally-friendly electrostatic powder coating applied to all sides, including bottom. The finish is scratch-resistant, providing a lifetime quality appearance.