This is an optional Kyosho RM/HM-Type FRP Rear Suspension Plate Set, and is intended for use with the Kyosho Mini-Z MR-03 chassis. This suspension plate set provides increased flex compared to the carbon fiber plates and is ideal for low traction surfaces. Includes three different width plates, each with different levels of rigidity and will allow you to tune the flex of the chassis to suit a variety of track conditions.