448 20mm air duct panel products are offered for sale by suppliers on Alibaba.com, of which hvac systems parts accounts for 71%.
A wide variety of 20mm air duct panel options are available to you, such as aluminum, steel and metal.You can also choose from hotel, office and building 20mm air duct panel,as well as from graphic design, total solution for projects, and 3d model design 20mm air duct panel, and whether 20mm air duct panel is return and replacement, free spare parts, or onsite inspection.