HPI stock replacement bumper and nerf wing set for the Nitro RS4 and the Nitro RS4 Racer. Constructed of durable black composite plastic. Semi-flexible so that the bumper and nerf wings will flex under pressure, and will not break. This product includes one wide front bumper. Two Nerf wings (these go in front of the rear wheels for protection). Four M3x12x2 screws for mounting the nerf wings to the chassis. Four M3 nuts which fit onto the screws which hold the nerf wings to the chassis. There is not a graphite set available for the nitro series as of yet