GoPro
Mount Roll-Bar
Roll Bar Mount Mount for Gopro camera
Roll-Bar
Type: Roll Bar Mount Mount for Gopro camera
Features: Attach your GoPro camera to roll bars, tubes, the radiator cap (both metal and plastic caps) on karts, bike frames, bumper bars, ski/surfboard racks, Fits 3.5 - 6.35cm
Includes: 1x Roll Bar Tube Clamp, 1x Three-way Adjustable Pivot Arm (three piece assembly)
Guarantee: 1-Year
Source: https://shop.gopro.com/mounts/large-tube-mount-roll-bars-plus-pipes-plus-more/AGTLM-001.html