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Model 634 Roof Cap

• For 3 1/4" X 10" or up to 8" round duct.
• Built-in backdraft damper and bird screen.
• Steel housing, black electrically bonded epoxy finish. |
Model 636 Roof Cap
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For 3" or 4" round duct.
• Built-in backdraft damper and bird screen.
• Steel baked black enamel finish.
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Model 639 Wall Cap

• For 3 1/4" x 10" duct.
• Spring-loaded backdraft damper.
• Built-in bird screen.
• Steel baked black enamel finish.
• 24 GA CRCQ Steel, black electrically-bonded epoxy finish
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Model 641 Wall Cap

• For 6" round duct.
• Built-in backdraft damper and bird screen.
• Aluminum natural finish.
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