18" X 12" 3-Way AIR SUPPLY GRILLE - DUCT COVER & DIFFUSER - Flat Stamped Face 18in diameter Adjustable airflow control - by

Adjustable airflow control - by rotating the middle disk

actual front end outer dimensions are approximately 32 5/8" width X 12 5/8" height

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

Actual Filter Size – 13 3/4"w x 5 3/4" x 1"

18" X 12" 3-Way AIR SUPPLY GRILLE - DUCT COVER & DIFFUSER - Flat Stamped Face 18in diameter Adjustable airflow control - by+ Product Details Size 18"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 13. 75" height. High Quality High grade steel construction with easy unrestricted air flow for your HVAC system. Installation Location Sidewall & ceiling. Design Multi shutter damper with handle lever for easy opening and closing screws included. Powder Coat Finish Smooth, shiny, scratch resistant,