These are the optional RPM Nerf Bars for the Traxxas Slash and Slash 4x4.                                                                                    FEATURES: Composite plastic, black in color                                                        Protects the sides of the chassis from side impacts, roll overs and T-bone crashes                                                                                                                                      INCLUDES: Two RPM Nerf Bars                                                                                                                                     REQUIRES: Attaching to sides of chassis                                                                                                                         SPECS:    Length: 4.5" (114mm)