18" X 8" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 18" Diameter provides a modern look and

provides a modern look and quiet operation due to its half-inch by half-inch cube design

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

Actual Filter Size – 24 3/4"w x 29 3/4" x 1"

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12"w X 4"h Is The Size For The Duct Opening Measurement Only

18" X 8" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 18" Diameter provides a modern look and+ Product Details Outer dimensions: 19. 75"W x 9. 75"H fits a 18" X 8" duct opening Durable stamped steel construction ensures long lasting performance Designed for sidewall and ceiling installation with included screws Multi shutter damper with easy lever for precise airflow control Smooth powder coated white finish for a sleek look and scratch resistance + Product Description Maximize your homes airflow with this premium Air Supply Grille air supply