uxcell Hex Coupler 5mm Bore Motor Hex Brass Shaft Coupling Flexible Connector for Car Wheels Tires Shaft Motor 8pcs

Description : 1.Material: Made of high quality 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: 5mm Fastening Screw Hole: M4