Photo 1 of 20"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Waterproof & Rain Block - with Screen Mesh - HVAC Weather Grille [Outer Dimensions: 21.5"w X 21.5"h]

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Photo 1 of 20"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Waterproof & Rain Block - with Screen Mesh - HVAC Weather Grille [Outer Dimensions: 21.5"w X 21.5"h]Photo 2 of 20"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Waterproof & Rain Block - with Screen Mesh - HVAC Weather Grille [Outer Dimensions: 21.5"w X 21.5"h]