Diameter:DN8mm,DN12mm,DN16mm,DN20mm,DN25mm flexible hose. material:SUS304 or 316L(annealed,bright) water heater,heat changer. length=1m-50m in roll. fitting:brass male,female,nut,nipple gasket: PTFE gasket washer connector with or without NBR insulation,thickness:13mm or 19mm with or without wire with or without PE tape with or without nylon and wire mixed braid protected insulation.