1,3 years guaranteed 2,Material:ss304 ,brass or ss nuts, PVC/PE coated 3, ... 20 25 4,Thickness:0.2--0.3mm ss corrugated gas hose high pressure pipe1) Connects firmly,2) Has long performance life,3 ... ~70,9)Corrosion resistant,10)Won't jam gas,11)Hose ripple: dense corrugated circular wave ,12)Thickness of stainless steel ... ,500-1000mm 750-1500mm 1000-2000mm KH-312 argon gas hose