... coupling 1.size : 1",1.5",1.75",2",2.5",3",4",5",6" 2.type: American coupling, British coupling ,and others supply ... according to your requirements 1. nominal diameter: 80mm2. working pressure :8-25bar3,type: American type coupling, British type coupling ,and others4 ... .material : aluminum ,copper5. size : 1",1.5",1.75",2",2.5",3",4",5",6"6.casting fire hose coupling resilient coupling