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"                                                                                                                                        COMMENTS: This will work on both the T-Maxx and E-Maxx with no modifications.