Broan Roof Vent Cap

Part 636 compatible with 3 Inches or 4 Inches round ducts Part 634 compatible with 3 1/4 Inches x 10 Inches or up to 8 Inches round duct Part 636 Material: 25 gauge CRCQ steel Part 634 Material: 24 gauge CRCQ steel Helpful Documents For pitched roof installation Steel baked enamel finish Built in backdraft damper and bird screen Not to be used as a dryer vent