2Pcs Blue 130mm Diameter Rubber Wheels for M4 Coupling Smart Robot Accessories

Specifications: 1. Color: Blue 2. Weight: about 160g 3. Diameter: 130mm 4. Wide: 60MM 5. Suitable: Lengthen the Coupling, Motor bore (inner diameter): 4/5/6mm 6. For: Smart robot car 7. Tire skin Material: Rubber Note: *It does not include the coupling. *You can measure the motor shaft diameter, according to the motor shaft diameter to choose the diameter of the coupling separately. Package Included: 2 x Blue Rubber Wheel