brass pipe C28000/CuZn40,C27200/CuZn37 O.D3-159,W.T0. ... -15.0 standards:ASTM B135 M-96 temper:O50 O60 brass pipepipe with thick wallnessC28000/CuZn40,C27200/CuZn37 ,C27000/CuZn35SIZEO.D3 ... performance,with a beautiful surface ,which r widely used in lamps ,lanterns,sanitary ware,valve body,pen manufacturing,refrigeration,and electricity ...