+ Product Details Size - 18"w X 14"h is the size for the duct opening measurement only
actual front end outer dimensions are approximately 18 5/8" width X 22 5/8" height
actual front end outer dimensions are approximately 10 5/8" width X 36 5/8" height
our damper helps create a well-balanced indoor environment
Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency
14" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return + Product Details Size -+ Product Details Size 14"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 875" width X 14" 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