12"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 31.75"h] Compatible with Duct 8" Looks like it was just SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe

Looks like it was just waxed

Actual Filter Size – 33 3/4"w x 21 3/4" x 1"

rust-free aluminum construction with smooth finished edges and counter-sunk screw holes (screws included)

no sharp edges & easy to clean

+ Product Details Size - 28"w X 34"h X 2"d (for duct opening measurement only)

12"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 13.75"w x 31.75"h] Compatible with Duct 8" Looks like it was just SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe Looks like it was just waxed Actual Filter Size – 33 3 4"w x 21 3 4" x 1"