aluminum finned tubes for the air cooler and heat exchange

The parameters and performance are as follows: 1: Technical parameters: the high degree of fin 0-16mm (or outside diameter of fin φ25-φ80);  pitch of fins 2.0-5.0mm;  length of finning tube  0.5~ 14m.
2: single metal rolling finning tube : pure aluminum 1060 or aluminum alloy 6063, the 6061 material of outside diameter less than 40 mm
3: double metal rolling finning tube : tube-based protection from the outer layer of aluminum tubes, corrosion-resistant; tube-based can be made from carbon steel pipe ,in addition to, stainless steel tube and copper tube can also be used, as well as titanium alloy tube.

Package:the aluminum finned tubes are well packed in plastic film in the inner and steel fram in the outer!