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Protect your ventilation from debris and insects with the Broan 634 Roof Cap. This durably crafted roof cap is constructed from black-finished steel and includes the damper. It's designed to be compatible with 8-inch round duct work.
Install your own fan exhaust with the Broan RVK1A Flexible Roof Ducting Kit This roof ducting kit includes 8 feet of 4-inch flexible ducting, roof cap model 636, 3-inch to 4-inch adapter, 4-inch diameter connector, and two 4-inch diameter clamps ...