This Blucher® 2-piece pipe hanger is manufactured from 316 stainless steel. It measures 1-1/2 in (40 mm) diameter with 1/2 inch BSP threads. It is treated with a pickling and passivation finish process. - (895.012.040 GS, 895012040GS, PH2-1.5-1/2, PH2151/2)