8" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter + Product Details Size -

+ Product Details Size - 20"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

+Product Details Size – 2"h x 12"w is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 35 3/4" x 1"

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8" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter + Product Details Size -+ Product Details Size 8"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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