Broan RVK1A Flex Roof Vent Kit, Flexible Duct

Roof Vent Kit, For Use With Heating and Cooling Systems, Includes (2) 4 in Clamps, 4 in Diameter Metal Duct Connector, 4 to 3 in Reducer, 8 ft Long x 4 in Diameter Flexible Metal Ducting. Not suitable for dryer venting or flat roofs.

Includes 8 feet of 4", flexible, 2-ply metallic laminateducting, 4" diameter metal duct connector, 2 ductclamps, 4" to 3" reducer and Model 636 Roof Cap Duct conforms to UL181 Class 1 air connector requirements