36" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 30"w X 18"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

The integral multi-shutter damper with a convenient handle operator ensures that you can easily adjust the air volume

this air vent diffuser is built to last

+ Product Details Size - 14"w X 30"h is the size for the duct opening measurement only

36" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12" Round Duct Pipe + Product Details Size -+ Product Details Size 36"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 875" width X 14" 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