These are the optional Golden Horizons Aluminum Hex Wheel Hubs for use on the Traxxas 1/16 E-Revo and Slash Vehicles. FEATURES: Aluminum construction Anodized orange in color INCLUDES: Four Aluminum Hex Wheel Hubs REQUIRES: Installation on the vehicle COMMENTS: Also available in: Blue(GHHC5101) Red (GHHC5103) Silver (GHHC5104) Golden HorizonsPart GHH05102