Ideal-Air Silver/Silver Flex Ducting 4 in x 25 ft

Ideal for air cooling all Sun System® hoods. Also can be used in various heating, ventilating or exhausting applications. These Class 1 aluminum flexible air ducts are made from tough, puncture-resistant, 3-ply aluminum foil laminate and contain a high-density, corrosion resistant wire helix in the duct wall for support.