Allegro Industries 16 X 25' Flexible Duct For Axial Blower
Allegro Retractable Ducting is lightweight, retractable and designed for maximum air handling capabilities. Dual direction flow with minimum friction loss. Constructed of single-ply vinyl and polyester with a PVC coating over Class 1 hard drawn spring steel wire helix. The retractable, non-collapsing design is heat resistant up to 150 F.