These high-grade ball bearings assure smoother wheel movement for overall faster performance. One side of the ball bearing hold is made of transparent plastic allowing you to see the actual ball bearings. Set includes two ball bearings (outside diamter: 5mm/ inside diameter: 2mm) and two 2x13mm stainless shafts.
*Compatible Chassis: Mini 4WD PRO MS Chassis
*Compatible Chassis: Mini 4WD PRO MS Chassis
