Cast Iron Pipe Fitting Hydraulic Quick Coupler Thread1.standard: BS, DIN ,NPT ... black Good quality Cast Iron Pipe Fitting Hydraulic Quick CouplerMaterial: malleable ironFinish: galvanized,blackAs a professional ... over, round caps etc.Cast Iron Pipe Fitting Hydraulic Quick Coupler:Product ItemMalleable iron pipe fittings: elbows, tees, sockets ... air Cast Iron Pipe Fitting Hydraulic Quick Coupler Thread