7mm For Car Wheels Tires Shaft Motor Flexible Coupling Coupler Connector pack 2 Coupler copper shaft coupling for the car wheels tires DC motor robot car. It can support any of the motor shaft diameter of 7MM. 2pcs 7mm length Hexagon Motor Flexible Coupling 2pcs Brass Material 7mm length Hexagon Motor Flexible Coupling Package Include: 2 x Shaft Motor Flexible Coupling Coupler 1 x Allen Wrench 4 x Screws