17.13 in. of high-strength aluminum alloy case in blue. It features adjustable spot to flood beam, rotating switch and complete O-ring seals. Has two high intensity White Star Krypton Gas Lamps for enhanced brilliance and extended range with 36 hours lamp life and 14 hours continuous battery life and 18K Peak Beam Candlepower. It requires 5-D Cell alkaline batteries. Weighs 43.50 ounces with batteries.