18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w34h34 Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 5 3/4" x 1"

+ Product Details Size – 14"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 21 3/4" x 1"

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+ Product Details Size – 24"w X 8"h is the size for the duct opening measurement only

18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w34h34 Actual Filter Size – 31+ Product Details Size 18"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