10" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter with actual outer dimensions of

with actual outer dimensions of 12

+ Product Details Size - 12"w X 18"h is the size for the duct opening measurement only

High Quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

actual front end outer dimensions are approximately 10 5/8" width X 20 5/8" height

10" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter with actual outer dimensions of+ Product Details Size 10"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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