45 steel is a kind of iron, which is harder and stronger than ordinary iron. Very durable. The coupling is a fitting connecting the motor shaft and the optical shaft, and it is also a fitting connecting the two shafts.
Product length: 22mm, Out diameter is 14mm
Bore: 4mm to 4mm, 5mm to 5mm, 5mm to 6mm, 5mm to 5mm, 6mm to 6mm, 6mm to 8mm, 8mm to 8mm
product material: 45 steels
Package Included:
Coupler x 1
Screw x 4