12" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12in diameter + Product Details Size –

+ Product Details Size – 18"w X 16"h is the size for the duct opening measurement only

reducing electric bills and extending HVAC machine lifespan

+ Product Details Size – 22"w X 30"h is the size for the duct opening measurement only

The tool-free latch allows hassle-free maintenance

Heavier gauge than needed

12" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12in diameter + Product Details Size –+ Product Details Size 12"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 875" width X 6" 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