1. You can mount it on your bicycle seat rail,capture wonderful photo/video with your camera when you are riding.2. Bicycle saddle rail seat mount for gopro Hero2/3/3+/4, designed to lock your camera securely underneath your saddle on the rails.3. The product is processed by CNC aluminum, and the surface is black oxidized to prevent seawater and other corrosion. The product comes with a screw hole for fixing the camera, which can facilitate the installation of the camera.4. Fits all standard 2-Rail saddles including oversized carbon rails.5. The product is suitable for all models of for GOPRO.Material:Aluminum alloycolour:BlackPackage Contents:1 * Mount holderOnly the above package content, other products are not included.Note: Light shooting 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.