... Thread Standard 3 Black,Galvanized 4 ISO,SGS,CIQ Cast Iron Pipe Fitting Hydraulic Quick water Coupler size: 1/8 ... crosses, flanges, plugs, backnuts, crosses over, round caps etc. Cast Iron Pipe Fitting Hydraulic Quick Coupler, size: 1/8'-6' Product ... antirust propertyProduct UsageSuitable for joining pipe lines of team gas oil airMechanical PropertiesTensile Strength>=33kg/mm2, Elongation>=8%,Hardness ...