20" X 20" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling flat stamped steel + Product Details Size –

+ Product Details Size – 30"w X 36"h is the size for the duct opening measurement only

Design – 180 degrees double direction adjustable - fins are manually adjustable individually for optimal air distribution

+ Product Details Size – 14"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 28"w X 36"h is the size for the duct opening measurement only

20" X 20" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling flat stamped steel + Product Details Size –+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 875" width X 22" 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