Fire Hose Coupling (German Standard) 1) Models:KD50, KD65, KD80, KD100, KY50,KY65,DN50, KN65 2) Nominal Diameter :50mm, 65mm, 80mm, 100mm 3) Working Pressure :1.6Mpa 4) Strength Test Pressure: 2.4 Mpa 5) Material :Cast Aluminum