Features:
In simple construction, the coupler is easy to be installed and used.
The coupler is shock-proof and anti-abrasive, and buffers well.
Used for connecting the driving shaft and drived shaft so that they can rotate as one.
It is small, delicate, fine, reliable and strictly functional


Specifications:
Material: aluminum alloy.
Outer diameter: 18mm.
Height: 25mm.
Inner diameter: 3*4mm