... 4mm-30mm 3.Fins Height: 5mm-25mm finned tube making machine 1.G fin, L fin, LL fin, ... -frequency welding/Extruded/L-foot etc. 3.Types of bare tube: Seamless & Welded 4.Material: Carbon ... MATERIALTUBE SIZEFIN SIZEHigh Finned TubeExtruded Fin TubeAll Kind of Material can be appliedAluminum A1050, A606115.88~50 ... C TubeTurbo-E TubeCorrugated TubeAll Kind of Material--6.35~402~9FPI finned tube making machine