24" X 24" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 10" Diameter And is classified as Class

And is classified as Class 1 Fire Proof - B1

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

+ Product Details Size - 18"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 21 3/4" x 1"

24" X 24" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 10" Diameter And is classified as Class+ Product Details Size 24"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 875" width X 26" 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