The three-hole butterfly design breaks through the traditional style and enhances the use limit of the butterfly . Made of aluminum alloy hollow.All-aluminum alloy hard thickened oxidized surface treatment, more scratch resistant; 304 stainless steel screw spring; wide and handle, more convenient and easy to rotate, does not hurt the hand.The diving clamp mount for Diameter 25mm ball compatible with arm like ULCS, Ikelite, INON, SEA&SEA...Material: Aluminum alloySurface treatment: Premium hard-anodized anti-abrasive finishSize: 55mm*55mm*62mm(L*W*H)Color: BlackWeight: 65gPackage Including: 1* 3 holes ball clamp mountNote: The light, bracket tray and waterproof case are not included Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.