Just&middot;Now&reg; Bike Bicycle Motorcycle Handlebar Seatpost Roll Cage Mount With Adapter for GoPro Hero 2 3 3+ 4 Sport Camera This is Bicycle Handlebar clamp/Pipe Clamp, can securely attaches your GoPro,digital cameras to Bicycle handlebars and other outdoor gear ,you can record all the action while keeping your hands free. Works great on Tripods, Music Stands, Microphone stands, Motorcycles, Bikes, and other pipe or bar that diameter from 0.70-1.38in(18-35mm) Brand new and high quality,Rubber inserts prevent slippage and prevent damage to your equipment Compatible with GoPro Hero 3+ 3 2 1 cameras, Multi-angle rotation, easy adjustment for optimal viewing. Easy to install and remove