[Jie Weinuo Industry strongly recommended - flange plate duct] I produced galvanized duct, metal duct, angle iron flange duct, without flanges duct. Galvanized sheet thickness 0.5 / 1.5 thick, galvanized duct spraying. [Jie Weinuo Industrial Star recommendation - carbon steel plate duct] Jie Weinuo produce steel duct (ordinary steel), galvanized sheet (galvanized iron) wind pipe, stainless steel ventilation pipe, glass steel ventilation pipe, plastic ventilation pipe, composite air duct , color steel sandwich insulation panels ventilation tube, rubberized cloth ventilation tubes (such as mine ventilation duct), mine ventilation pipes and other plastics; ventilation ducts BY PURPOSE: general are: the return air duct cleaning system, central air conditioning and ventilation pipes, industrial supply and exhaust ventilation pipe, environmental protection system for suction and discharge pipe, mine gas drainage tube, hair dryer and other mine rubberized cloth; ventilation ducts by shape points: General: round, rectangular, spiral shape. Quote Tianjin Tianjin exhaust pipe exhaust pipe engineering, exhaust pipes Tianjin, Tianjin galvanized duct selected by 捷维诺 捷维诺 Industries (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.tjjwnsy.com) is a professional, "a total of flange plate duct dampers, fans, ventilation ducts, evaporative air conditioners, cable bridge" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Jiewei Nuo" brand has a good reputation. We adhere to the "service first, customer first" principle, so 捷维诺 Industries has won numerous customer's trust in fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!