20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 17.75"h] Copper Coil + Product Description Maximize the SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

engineered for seamless 360-degree airflow in T-bar ceilings

Measure the size of the air duct/drywall opening

+ Product Details Size - 30"w X 32"h X 2"d (for duct opening measurement only)

+ Product Details Size – 16"w X 6"h is the size for the duct opening measurement only

20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 17.75"h] Copper Coil + Product Description Maximize the SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe + Product Description Maximize the efficiency of your ventilation system with our top of the line HVAC grilles and registers engineered for seamless 360 degree airflow in T bar ceilings