Z-FLEX 6" x 25 Ft. Fab 6-M Fabriflex Acoustical Duct, R6 (Insulated)

Pressure Rated 6” w.g. positive 5” w.g. neg thru 16” dia. 1” w.g. neg. 18” & 20” dia. Rated Velocity : 5500 F.P.M. Core : SPUNBOND Nylon Fabric Vapour Barrier Permeance : .05 Perm A.S.T.M. E96 Procedure A Note: This product is compressed by the manufacturer and then packaged for shipping purposes. To reach the specified length, the product needs to be unpackaged and stretched.