Adapter for non-circular cross-section bars

Adapter for non-circular bars. It is mounted into the the fork tube (hedge-hock). Center of the board is in betwwen of the bars axis and adapter axis. Adapter delivery contains longer screw + plastic spacer. Total weight approx 50 grams, in black color, made from 31,8 mm diameter bars..

Another option for carbon combo is mapholder ZeroPilot  ZeroPilot video here