Photo 1 of 18"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Rain & Waterproof Air Vent with Screen Mesh - HVAC Grille - Aluminum [Outer Dimensions 19.5”w x 21.5”h] 18 x 20 Anodized Aluminum

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Photo 1 of 18"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Rain & Waterproof Air Vent with Screen Mesh - HVAC Grille - Aluminum [Outer Dimensions 19.5”w x 21.5”h] 18 x 20 Anodized AluminumPhoto 2 of 18"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Rain & Waterproof Air Vent with Screen Mesh - HVAC Grille - Aluminum [Outer Dimensions 19.5”w x 21.5”h] 18 x 20 Anodized AluminumPhoto 3 of 18"w X 20"h Aluminum Exterior Vent for Walls & Crawlspace - Rain & Waterproof Air Vent with Screen Mesh - HVAC Grille - Aluminum [Outer Dimensions 19.5”w x 21.5”h] 18 x 20 Anodized Aluminum