These are the optional GH Racing Aluminum Rear Lower Arms for use on the Traxxas Slash 4 x 4. FEATURES: Aluminum construction Anodized red in color INCLUDES: Two Aluminum Rear Lower Arms Two 3x26.5mm Hinge Pins Two 2x7mm screws REQUIRES: Installation on rear suspension COMMENTS: Also available in Blue (GHHC5203) Silver (GHHC5205) Golden HorizonsPart GHH05204