Features: With this mount bracket, you can attach your tail light to your bike, maximums visibility and safety during cycling, especially in low light conditions. The bike seat rails mount bracket is make of aluminium alloy, with stainless steel bolts. The saddle bow lamp conversion adapter features a chamfered joint entry for easy and smooth insertion, enhancing installation convenience. Easy to install, suitable for most road and mountain bikes. With the saddle action camera mount, enjoy moderate foot thickness for effortless tightening and secure positioning of your camera. Specifications: Component: Aluminum Alloy Length: about 71mm/2.8inch Package Includes: 1set Bicycles Seat Post Rear Light Bracket note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.