ube Material - M.S. Copper, S.S.Fin Material - M.S. Copper, S.S. Alluminium.Tubes are pressure tested.Tubes are finned spiral continous tension wound on special finning Mc, firm contact of fins with tube gives high efficiency.Most suitable to heat or cool - Oil, Air, Water, Dyes, Chemicals, Gases & other items.Economical design to withstand pressure.High heat transfer and safety.Intergral finned copper tubes for condensors are also available.Oil coolers and After Coolers used in compressor.