Air Flow Rate : 5000 Fpm Vapor Transmission : 0.17 Perm R-Value : R4.2 Temperature Rating : -20 To 250 Deg F Insulated/Non Insulated : Insulated Material : Polyester Color : Black Inside Diameter : 8 In Length : 25 Ft
Nominal Size : 4 In Air Flow Rate : 4000 Fpm Temperature Rating : -20 To 250 Deg F Material Gauge : 2 Material : Fiberglass Finish : Silver Outside Diameter : 4 In Length : 25 Ft