This is the optional 17mm Short Wheel Hub Set for the Traxxas Slash 4x4.    
                                                                               
FEATURES: Hubs and wheel nuts constructed of aluminum, anodized blue in color  
          Steel hub retainers and axle pins                                    
          Allows the use of wheels with 17mm hex                               
                                                                               
INCLUDES: Four each Wheel Hubs, Wheel Nuts, Hub Retainers and Axle Pins