1-3/4 in collar. Includes damper and screen.
Dimensions
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:
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11.5 in L x 9 in W x 7.26 in H
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Includes
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(1) Aluminum Roof Cap
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Material
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Aluminum
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Specifications
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4 in Open
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- Damper and screen prevents outside elements from entering the vent
- Screen prevents birds from nesting inside of vent
- Designed to prevent leaks with proper installation
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Catalog
https://assets.unilogcorp.com/187/ITEM/DOC/Lambro_100001829_Catalog.pdf
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Line Drawing
https://assets.unilogcorp.com/187/ITEM/DOC/Lambro_100059496_Line_Drawing.pdf