Give your wheelie model a good start with this specific Hop-Up Option set! It provides E-ring secured stainless shafts to be used in reduced suspension system hands, giving smoother and truer motion than the initial screw pins. The aluminum support bridge acts as a brace where in actuality the suspension shafts connect the reduced arms on chassis. 3x37mm Stainless Steel Shafts x2 3x52mm metal Shafts x2 Aluminum help Bridge x1 E-Rings x10 appropriate for GF-01 and WR-02 chassis cars.