Lower Arm Brace, Purple (2): S21, S25,SAVX,SAVXL HPI Racing purple lower arm brace for the Savage .21. Constructed of purple aluminum. This product includes two braces.Length: 70 mm (2.75")Width: #160; 17 mm (0.669")Height: #160; 3 mm (0.118") Requires: Savage .21