1,3 years guaranteed 2,Material:ss304 ,brass or ss nuts, PVC/PE coated 3,DN 12 15 20 25 4,Thickness:0.2--0.3mm ss corrugated gas hose high pressure pipe1) Connects firmly,2) Has long performance life,3) High flexibility4) Can be bent freely5)Working Pressure:6Bar,6)Test Pressure:10Bar,7)Burst Pressure:100Bar,8)Working Temperature:-40~70,9)Corrosion resistant,10)Won't jam gas,11)Hose ripple: dense ...