... Pitch: 4mm-30mm 3.Fins Height: 5mm-25mm finned tube making machine 1.G fin, L fin, LL fin, I ... frequency welding/Extruded/L-foot etc. 3.Types of bare tube: Seamless & Welded 4.Material: Carbon steel/Stainless steel/ ... C122012.70~50.87~11.5FPIFin Height Max 16mmHG-Fin Tube (Imbeded Type)Aluminum A1100, A1050, A1060High Frequency Welded Finned ... Kind of Material--6.35~402~9FPI finned tube making machine