This might be a limited-edition Mini 4WD racing roller set that commemorates Japan Cup 2020. These lightweight yet tough rollers have actually built-in 520 ball bearings for smooth movement, and can be used for both front and rear roller setups. The components have actually an anodized black finish with unique lettering/logo!
• 19mm Aluminum Ball-Race Rollers x2
• Screws for accessory included.
• appropriate for all Mini 4WD and Mini 4WD PRO automobiles. (take note that some figures may require modification.