heater tube Grade: 304.321.316L.309S.310S O.D:3mm-12mm W.T.0.25-1.5mm Appliance:Electronics,hardware,ect ASTM A554,A269 heater tubeFeatures: 1) Production Standard :ASTM A269;ASTM A554,2) Material of commonly used stainless steel:TP304,TP321,TP316L,TP309S,TP310;Material of other stainless steel:202,302,INCOL800,840,8253) Specification range:outer diameter:3mm-12mm; wall thickness:0.25mm-1.50mm4) ...