HSU Aluminum Bike Bicycle Handlebar Mount and Extension Arm Kit for Action CamerasProduct Description 360 Degree Rotation: Rotatable GoPro bicycle handlebar mount allows 360 degree rotation (30 degrees rotation) for your shooting from different angles, meeting your all around shooting requirement Easily Installing: The Handlebar Mount can be installed onto any round or semi round tube 0. 9 1. 3(22mm 34mm) All Aluminum Alloy Extension Arm Kit: 3 x aluminum alloy extension arms of different lengths (11. 8 6. 5 3. 3) + 3 x aluminum