TUBES : Bright Annealed Copper :38 , , 58 Wall ; Thk 0.4 - 0.55mmAluminum Copper Fins , sine wave type 0.11mm - 0.4mmChilled Hot Water ; Brine & Dx ( Refrigerant ), SteamAnti Corrosive Hydrophilic ; Blue , Gold , RedFrame : G.I. , S.S. , Al , CuHeader Pipes : G.I. M.S. S.S. CuHydraulic Mechanical ExpansionOPTIONS Available with 3 - 6 pass PVC AL Steel MistEasy Pull out roller based systemMAX SINGLE SIZE 12 Row Deep