... diameter: 4-20mm Wall thickness: 0.5-2.5mm Aluminum coil tube specification:Alloy: 1100, 1050, 1060, 1070, 3003Out ... for automobile, intercooler, evaporator, warm wind movement, air conditioner pipeline, car radiator, cooler, freezer, heat exchanger, refrigerator and ... on body of coil tube4.one coil has one end5.fill with hydronitrogen aluminum coil tube 3003 used for cooker,refrigeratory,radiator