Features:1) An extended flashlight body for the Solarforce L2 Series flashlights2) Made of T6063 T6 aluminum alloy in Mil-spec type III hard-anodized (matt black) finish with enhanced anti-wearing and anti-erosion features3) Used with 4x CR123A or 2x18650 batteries4) Waterproof o-rings5) Compatible with Solarforce L2， L2m， L2n， L2P， etc. and most flashlights with Surefire compatible tailcaps.6) Compatible with Solarforce LED Head: M3， M3s， K37) Compatible with Solarforce Tail-cap Switch: L2-S6， L2-S8， L2-S10， L2-S11， L2-S12， PTS-2， PTS-3Specifications:1) Material: aluminum alloy2) Brand: Solarforce3) Weight: 135g4) Length: 165mm5) Head diameter: 28.3mm6) Tail diameter: 20.5mm7) Body diameter: 25.3mm8) Note: only includes the battery tube