20" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Adjustable Return + Product Details Size -

+ Product Details Size - 36"w X 36"h X 2"d (for duct opening measurement only)

Its locking eight-tumbler mechanism and supplied key safeguard your thermostat from tampering

actual front end outer dimensions are approximately 12 5/8" width X 30 5/8" height

+ Product Details Size - 16"w X 24"h is the size for the duct opening measurement only

Universal size

20" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Adjustable Return + Product Details Size -+ Product Details Size 20"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 13. 75" 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