12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Grilles + Product Details Size -

+ Product Details Size - 28"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 16 5/8" height

+ Product Details Size - 34"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 32"h is the size for the duct opening measurement only

For 14" Round Duct Opening - Spiral or Flex

12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Grilles + Product Details Size -+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 875" width X 10" 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