About spiral air duct
4256 spiral air duct products are offered for sale by suppliers on Alibaba.com, of which duct making machines accounts for 27%, hvac systems parts accounts for 16%, and registers & grilles accounts for 1%.
A wide variety of spiral air duct options are available to you, such as hotel, building and industrial.You can also choose from abs, steel and galvanized steel spiral air duct,as well as from white, black, and silver spiral air duct,and whether spiral air duct is durable, or easily install.