24" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Round Damper Ring They seamlessly integrate into sheet

They seamlessly integrate into sheet rock plaster frame ceilings as well

+ Product Details Size – 28"w X 6"h is the size for the duct opening measurement only

The crank handle lever makes it easy to adjust to every weather situation

Customize effortlessly with a removable face/door

Actual Filter Size – 15 3/4"w x 21 3/4" x 1"

24" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Round Damper Ring They seamlessly integrate into sheet+ Product Details Size 24"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 875" width X 20" 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