Builder's Best UL 181 Flexible Foil Ventilation Duct, 4" x 8', Aluminum/polyester Brand_Udder Balm Wood can be stained or

Wood can be stained or painted to match decor

Boxed packaging

or hex work

hydraulic bottle jack

White pipe wih red print

Builder's Best UL 181 Flexible Foil Ventilation Duct, 4" x 8', Aluminum/polyester Brand_Udder Balm Wood can be stained orThis wire helix product features steel wire support with a multi ply design of metalized polyester and aluminum polyester laminate. It is UL 181 listed and labeled as a Class 1 Air Connector. UL 181, Class 1 air connector label Multi ply design of metalized polyester and aluminum polyester laminate Steel wire support 3 dia. has pitch 412 dia. has 1 pitch UL sticker every 10 feet Maximum velocity rating 5000 fpm