16" X 4" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White w16h16 Adjustable airflow control – Adjustable

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

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

actual front end outer dimensions are approximately 28 5/8" width X 12 5/8" height

actual front end outer dimensions are 13

Actual Filter Size – 15 3/4"w x 15 3/4" x 1"

16" X 4" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White w16h16 Adjustable airflow control – Adjustable+ Product Details Outer dimensions: 17. 75"W x 5. 75"H fits a 16" X 4" 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