... aluminium parallel flat tube and round tube 3:sample can be avaiable Round tube Alloy: 1000 series, ... condenser tubeFlat tubeAlloy: 1000 series, such as 1050,1100,1070. 3000 series,such as 3003,3102, ... 6000series,D97width 12mm~38mm higher 1mm~4mm wall thickness 0.2~0.5mm hole no. water box ... pipe 2~5 and condenser pipe 5~30.... aluminium parallel flat tube for ...