... Exchanger Tube Aluminum Coil Tube1)Alloy: 1000,3000,series,and we can provide other series2)Temper: O,F,T4 ... :6) Types: Square tube, round tube, special pipe, straight tube, capillary tube and so on7) Different sizes available8) Can produce according ... conductivity and thermalconductivity, but low intensity, heat treatment , so they can be used in fridge,freezeing and exchanger etc. round extroud ...