Hole Diameter:one side hole diameter is 4mm, other side hole diameter 4mm
Universal Joint Outside Diameter:9mm
Universal Joint Length:23mm
Screw Size: M3
Material: Stainless Steel
Allow the angle between the two axes within a limited range vary with operational needs.
The metal universal joint is suitable for straight shaft motors,use for model cars, model ships, robots and other types of metal transfer.
Used in RC Helicopters, Boats, Planes and Cars, etc.