Builder's Best UL 181 Flexible Foil Ventilation Duct, 4" x 8', Aluminum/polyester Flashings concave and convex

concave and convex

Maximum velocity rating 5000 fpm

Wire Stripper Notch

EDGES ARE BEVELED AND COMES WITH 4 COUNTERSUNK SCREW HOLES

Builder's Best UL 181 Flexible Foil Ventilation Duct, 4" x 8', Aluminum/polyester Flashings concave and convexThis 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