ZM Heavy-Duty Waste Arm is constructed of a high-impact, 22-gauge brass with a chrome finish to resist corrosion and provide extra strength and durability. The arm measures 1-1/2 inch x 12 inch and is equipped with a slip-joint connection for an easy installation. Designed for use in tubular drain applications for the best performance. The waste arm is certified by the Uniform Plumbing Code (UPC) for product safety.