Optional arms for Balt® Circulation Series Chairs, BLT-34552, BLT-34553 and BLT-34554. Black injection polypropylene. 7/8" diameter silver tubular steel. Arm Style: N/A; Color(s): Black; Silver; Arm Material(s): Polypropylene; Armcap Material(s): Polypropylene. Manufacturer's one-year limited warranty. Includes two arms.