20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling ceiling Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 14 5/8" width X 20 5/8" height -

+ Product Details Size – 10"w X 18"h is the size for the duct opening measurement only

875" width X 21

20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling ceiling Actual Filter Size – 24+ Product Details Size 20"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