Raymarine Autohelm 4000 Wheel Pilot 16mm Spoke Clamps ST4000 

Raymarine Autohelm 4000 Wheel Pilot Spoke Clam for 16mm spoke. This is a 3D printed part made from solid PETG plastic. This is one clamp and one base plate. M4 screws are not included. This was originally made and printed to replace a broken clamp on my boat.

eBay