These ball-race rollers commemorate Japan Cup 2016. The lightweight yet tough 19mm aluminum rollers have a black anodized finish and feature pad printed Tamiya logo and Japan Cup 2016 lettering. They have built-in 520 bearings to provide your machine with smooth movement. They may be used as either front or rear rollers. 19mm Aluminum Ball-Race Roller x2 Attachment screws included. Compatible with all Mini 4WD and Mini 4WD PRO chassis machines. Note: Some bodies may require modifications for best fit.