18" X 18" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 8" Diameter Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 10" duct openings

+ Product Details Size - 10"w X 10"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 38 5/8" width X 8 5/8" height

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

Multi-shutter damper with handle operator to adjust air flow

18" X 18" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 8" Diameter Ideal for Walls & Ceilings:+ Product Details Outer dimensions: 19. 75"W x 19. 75"H fits a 18" X 18" 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