【Type】- 6mm Hex Brass Shaft Coupling, suitable for model shaft connection, perfect accessories for RC Model motor, etc. 【Coupling Size】- Hex Height : 6mm ; Opposite Side: 12mm ; Cylinder Height: 12mm ; Cylinder Outer Diameter: 11.5mm ; Cylinder Inner Diameter: 6mm ; Fastening Screw Hole: M4 【Material:】- Made of brass, sturdy, reliable and strictly functional. Durable and insulation, make your shaft more stable, easy to install and replace. 【Function】- A special coupler, used for connecting the motor shaft and the hexagon wheel of the robot and other models. 【Package Content】- 4pcs Hex Coupler, 8pcs M4 Screws, 2pcs 2mm Hex Wrench. Description :
1.Material: Made of pure brass, sturdy, reliable and strictly functional.
2.Function: A special coupler, used for connecting the motor shaft and the hexagon wheel of the robot, cars, and other models.
3.Use: Suitable for model shaft connection, perfect accessories for RC Model motor, etc.
4.Feature: Durable and insulation, make your shaft more stable, easy to install and replace.

Specification :
Hexagonal Side: 7mm
Hex Height : 6mm
Opposite Side: 12mm
Cylinder Height: 12mm
Cylinder Outer Diameter: 11.5mm
Cylinder Inner Diameter: 6mm
Fastening Screw Hole: M4