14" x 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return Grille actual front end outer dimensions

actual front end outer dimensions are approximately 21 5/8" width X 33 5/8" height

And is classified as Class 1 Fire Proof - B1

+ Product Details Size - 6"w X 20"h is the size for the duct opening measurement only

+ Product Description Ventilate your home or commercial space with our Aluminum Outdoor Weatherproof Louvers

+ Product Details Size - 22"w X 30"h is the size for the duct opening measurement only

14" x 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return Grille actual front end outer dimensions+ Product Details Size 14"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 875" width X 12" 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