used in refrigerator, freezer ,condenser, evaporator and compressor etc,cost is low ,quality is good and competitve price plain steel tube 1.Materials: bao steel ,low carbon steel strip2.Main use: widely used in wire-tube condenser, evaporators,refrigerator , refrigeration, chiller, heaters, freezer etc3.outer diameter: 4mm,4.76mm,6mm,6.35mm,8mm 4.wall thickness: 0.5mm,0.6mm,0.65mm,0.7mm 5. ...