18" X 6" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Material_Steel Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 33 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 32 5/8" height

Weather and Pest Proof – These louvers are especially designed to prevent water from entering your home

The total outer size of this grille is the listed size plus plus 2 and 5/8"

actual front end outer dimensions are approximately 26 5/8" width X 22 5/8" height

18" X 6" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Material_Steel Actual Filter Size – 17+ Product Details Outer dimensions: 19. 75"W x 7. 75"H fits a 18" X 6" 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