This is a pair of RPM Black Rear A-Arms for the TRA Revo. Constructed of composite nylon Angled leading and trailing edges eliminate dirt build-up Fits left or right side Two RPM Black Rear A-Arms for the TRA Revo with 16mm screw for shock mount rod Installing on vehicle Length: 4.9" (124mm) Width: 2.5" (63mm) Two packages are required per vehicle. jxs 2/24/05 ir/jxs &