MADE OF POLYCARBONATE WITH INTERIOR POLYETHYLENE FOAM LINER. STAINLESS-STEEL HINGE AND LATCH PINS. LOCKING HOLES: 0.1875" (3/16") DIAMETER. WATERPROOF UP TO 90 FEET FOR 30 MINUTES. PRESSURE RELEASE SLOT. PRESSURE RELEASE SLOT. UTILITY MOUNTS TO EASILY ATTACH CARABINER OR TETHER. INTEGRATED FEET ALLOW FOR A MORE SECURE BASE OR STACKING. COMPLIES WITH PROP 65. 8 3/10" W X 2 3/5" H X 5 1/10" D