14" X 14" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return only measure the "hole" in

only measure the "hole" in the wall/duct

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height

actual front end outer dimensions are approximately 26 5/8" width X 10 5/8" height

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

14" X 14" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return only measure the "hole" in+ Product Details Size 14"w X 14"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 875" width X 16" 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