The outer and inner are the compounded of Rubber/PVC/Nitrile. The middle is the jacket woven by 100% polyester yarn and filament. Working pressure can be 13bar, 16bar or 25bar. Max length is 60m. Production standard is BS6391 TYPE-3. Brass or Aluminum NPSH/NST, JOHN MORRIS or STORZ couplings are usually assembled.