The popular 19mm-diameter all-aluminum roller is specially designed with intrepid black anodizing and white printed MINI 4WD JAPAN CUP 2020 text. A 520 ball bearing is embedded in the bearing portion for smooth rotation. Screws and spacers for installation are also included. Can be attached to Mini 4WD PRO and other Mini 4WD models.Please do not use cleaners, etc. as they will remove the printing.