These are carbon fiber-reinforced plastic parts. The sprue contains lower suspension arm, gear cover parts and more. • TT-02B Reinforced Gear Cover & Lower Suspension Arm Parts x2 • Contains the following parts from the TT-02B C sprue: C1 (front lower arms), C9 (rear lower arms), C6 (body mounts), C7 (gear covers) and C8 (battery posts) • Glass fiber-reinforced parts improve chassis rigidity, and performance on high-grip carpet and asphalt surfaces. • Compatible with TT-02B chassis cars. Use with turnbuckle shafts.