Compatible with: GoPro Hero6, Hero5, Hero4, Hero3+, Hero3, Session/SJCAM, Rollei 530, Apeman, Sony FDR-X3000R, Garmin Virb Ultra 30/XE, and many more. Wide Selection: The handlebar mount can be mounted on any round or semi-circular tube from 22 mm to 33 mm.
eBay