HVAC Premium 18"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 19.75"h] w24h24 Actual Filter Size – 13 Height_16in RG1612AL Product Details Size 14

Actual Filter Size – 13 3/4"w x 29 3/4" x 1"

Design – Fixed Hinged for easy filter change & cleaning - uses a 1" thick filter

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High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

Actual Filter Size – 19 3/4"w x 25 3/4" x 1"

HVAC Premium 18"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 19.75"h] w24h24 Actual Filter Size – 13 Height_16in RG1612AL Product Details Size 14 Actual Filter Size – 13 3 4"w x 29 3 4" x 1" Design – Fixed Hinged for easy filter change & cleaning uses a 1" thick filter