supply John morris fire hose coupling 1)size 2.5"*2.5", 2.5"*2" 2)pressure 2Mpa-4Mpa 3)material aluminum or brass 1)fire hose coupling2)material :brass,aluminium3)size:2.5"*2.5", 2.5"*2", 2.5"*1.5", 1.5"*1.5", 2"*2", 2.5"*2.5" British type fire hose coupling