SR SUN RISE Universal Showering Components 15.7-inch Shower Arm, Chrome Purchase this shower arm will get another one product for free during Nov 21, 2017 12:50 AM PST  Nov 21, 2017 6:50 AM PS. More detail please refer to the promotions. Chrome Plated Solid Brass Ensuring Corrosion Resistance and Durable. Standard NPT 1/2 inch connection 15.7 Inch (40cm) extended screw thread enables a more secure fit Lifetime warranty. High quality brass material doesn&#039;t pollute water which will provide a better bathing environment for you and protect your skin. Ten layer chrome platedprevent corrosion. Years still bright clean like new. Sturdy brass construction can hold 8, 10, 12and 16&#034; rain shower head. Stand NPT male 1/2thread.