Exceeds all ul 1426, us coast guard charter boat CFR title 46 and ABYC standards. 3 inch diameter, 12 v dc, IP67 Waterproof, Flush mount. Chrome bezel: quality flange constructed; Durable Light Body: Durable clear plastic lens and body. Replaces existing stern & swim platform lights with LED lighting. The premium vinyl insulation is rated at 600 volts, oil, 105 deg C dry and 75 deg C wet, battery acid, heat, stays flexible even in extreme cold -40 deg F/C and resists salt water, gasoline, abrasion and ultra-violet radiation.