Tamiya Mini 4WD Mass Damper Set #15392This Mass Damper set provides excellent stabilizing qualities on technical courses with a lot of banked and raised sections. Can be installed at either the front or rear of your Mini 4WD chassis car. Set includes 3x25mm and 3x30mm stainless steel screws.New in original Tamiya package. Usable with Mini 4WD PRO, Mini 4WD chassis cars