... 3.Fins Height: 5mm-25mm heat exchanger extruded finned tube 1.G fin, L fin, LL fin, I fin, E fin, KL fin2.Available Processing Technic ... MaterialCopper &Copper Alloy TubeAlloy Steel MaterialCopper &Copper Alloy TubeMonometallic Fin TubeLow Fin TubeCarbon Steel, stainless steel, titanium, copper, brass, nickel ... TubeCorrugated TubeAll Kind of Material--6.35~402~9FPI heat exchanger extruded finned tube