These are the optional GH Racing Aluminum Rear Lower Arms for use on the Traxxas Slash 4 x 4. FEATURES: Aluminum construction Anodized blue 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 Red (GHHC5204) Silver (GHHC5205) lmm 6.2.10 ir/jxs