Our company is an ISO9001-2008 certified finned tube manufacturer (DR extrusion /L-LL winding /KL-KLM karmic /G inset). Our products also include HFW high-frequency welded finned tube, nailhead tube, H/HH type finned tube, longitudinal finned tube, laser welded finned tube, low-finned spiral tube, spiral tube, U-shaped tube and wave joint tube.