1,Standard:ASTM,DIN,UNI,GB 2,Use:auto evaporator 3,Material:low carbon steel tube 4,Copper coated,Zinc ... 10.000.7 12.000.7 12.700.71,Use:automobile brake system,condenser, evaporators.2,Standard:ASTM,DIN,UNI,GB3 ... thickness:0.5mm~0.7mm6,Outer diameter:3.18mm~12mm evaporator steel tube in car