Various parts sets for Mini 4WD. - Set Contents: Sliding Damper Roller, Progressive Down-Thrust Rollers, 19mm Aluminum Ball-Race Rollers, Multi Chassis Balance Weight, Lightweight Set-Up Rollers, Rubber Rimmed Roller - Item Name: Sliding Damper Roller - Item Name: Mini 4WD Multi Chassis Balance Weight Thank you for viewing. Applicable Cars Racers, Super, Full Cowl, Mini 4WD cars (Some car models require body modification)