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.