8" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling - Black 10" Round Duct Pipe + Product Details Size -

+ Product Details Size - 4"w X 24"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 5 3/4" x 1"

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

8" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling - Black 10" Round Duct Pipe + 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