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