20" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Black Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 15 3/4" x 1"

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+ Product Details Size - 18"w X 24"h X 2"d (for duct opening measurement only)

+ Product Details Size - 36"w X 24"h is the size for the duct opening measurement only

20" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Black Actual Filter Size – 31+ Product Details Size 20"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 8" 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