Brass Hex Coupler for Smart Car Wheel

Brass Hex Coupling, Rigid Shaft Coupling, Motor Shaft Coupler Material: Brass Length: 18mm Hex Diagonal Length: 13.8mm Hexagon Side Length: 12mm Screw Size: M4 Shaft Diameter: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm Suitable for 3mm to 8mm motor shaft This brass hex coupling suitable for micro robot, smart toy cars and kinds of DIY models Package List: 1 x Brass Hex Coupler