5-year limited warranty UL (Underwriters Laboratories) 2158A listed 4" dia semi-rigid aluminum vent duct flexes in any direction for easy installation Fire-resistant for operational safety Two 4" adjustable vent worm clamps ensure secure connection...
5-year limited warranty UL (Underwriters Laboratories) 2158A listed 4" dia semi-rigid aluminum vent duct flexes in any direction for easy installation Fire-resistant for operational safety Two 4" adjustable vent worm clamps ensure secure connection...