STRC Traxxas 4Tec 2.0 Aluminum Lower Shock Retainers are CNC Machined from thick high-quality aluminum and the variety of anodized colors give you the custom options you have been looking for to make your 4Tec 2.0 one of a kind. Combine these with ST Racing shock bodies (ST3764) and aluminum shock caps (ST8361) for the ultimate in custom aesthetics! Package includes four spring cups.