20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder Coated Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 29 3/4" x 1"

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

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actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height -

20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder Coated Actual Filter Size – 31+ 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