This is the replacement Arm Mount B for the Team Associated RC8 Factory Team and Race Spec RTR. This is for the front arms and mounts to the rear of the gearbox. Steel construction, black in color Replaces a worn or damaged arm mount B One Arm Mount B Installation following the model manual Length: 2.44" (62mm) Height: .55" (14mm) Thickness: .12" (3mm) For the Arm Mount A order ASCC6735 kpm12/19/2007 ir/jxs &