This is the Optional Big Bore Shock Set for the Traxxas T-Maxx and E-Maxx Trucks. These replace the plastic shocks that come stock with the kit. FEATURES: Strong Alloy construction Anodized gun metal grey with red springs Completely assembled Comes in a foam tray covered with a clear plastic box on a hangable header card. Convenient 8-pack. INCLUDES: Eight fully assembled alloy shocks with red medium springs Mounting hardware Two bottles of shock oil (30-weight, per Traxxas) REQUIRES: Filling shocks with shock oil and assembling onto the model. SPECS: Length: 4-1/8" (not compressed) Diameter: 3/4"