18" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder-Coated Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 27 3/4" x 1"

Installation Location – Ceiling

Its sleek contours bring a touch of modern sophistication to any room

Its durability and performance contribute to overall comfort

Installation Location – Sidewall or ceiling

18" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder-Coated Actual Filter Size – 21+ Product Details Size 18"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 18" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow