Broan RVK1A Roof Vent Kit
Brand: Broan-NuTone
Color: Black
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