SPECS: Aluminum, hardcoat anodized, black. PT1L – 3-5/16" (8.5cm) long, ¾" (19.6mm) body O.D. 2 oz. (57g) wt. Uses one CR-123A battery, included. PT2L – 4-5/8" (11.8cm) long, ¾" body O.D. 2.8 oz., (79g) wt. Uses two CR-123A batteries, included. PT 1AA - 3.97" long, 2.3 oz. Uses 1 "AA" alikaline battery (included). PT 2AA - 5.97" long, 3.4 oz. Uses 2 "AA" alkaline batteries (included).