Attach your GoPro camera to roll bars, tubes and more. Fits 1.4″ to 2.5″ (3.5cm - 6.35cm) diameter tubes. Perfect for clamping your camera to the radiator cap (both metal and plastic caps) on karts. You can also clamp to bike frames, bumper bars, ski/surfboard racks, or anything else that is in the size range above. Comes with pivoting orientation arms allowing for 3-way adjustability, ensuring you can get the angle you want. Construction: polycarbonate Hardware: stainless steel nuts and bolts Clamp Diameter: 1.4″ to 2.5″ (3.5cm - 6.35cm)Compatible with ALL HD HERO Original + HD HERO2 Professional Cameras Whats Included: 1 Roll Bar/Tube Clamp 1 Three-way Adjustable Pivot Arm (three piece assembly) Warranty: One Year