SPECS: 5.2" long x 1¼" (3.2cm) bezel dia. All models use two CR-123A lithium batteries, included. 6PX - Aluminum body and bezel, hardcoat anodized, matte black. 5.2 oz. (147gm) weight. G2X - Nitrolon polymer body, black. Aluminum bezel, anodized, black. 4.4 oz. (124gm) weight. Tactical - 200 lumens max output, 2.5 hours runtime. Pro – High output - 200 lumens, 2.5 hours runtime. Low output - 15 lumen, 45 hours runtime.