Fire Hose Coupling,Couplings,quick coupling,aluminum alloy coupling Nominal diameter:50mm,65mm,80mm,100mm W.P.:1.6MPa Fire Hose Coupling,Couplings,quick coupling,aluminum alloy couplingFeatures:1) Nominal diameter: 50mm, 65mm, 80mm, 100mm 2) Working pressure: 1.6MPa 3) Strength test pressure: 2.4MPa4) Applicable mediums: water, foam Fire Hose Coupling