10" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_Black Versatile Compatibility: Our ceiling grills

Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings

actual front end outer dimensions are approximately 30 5/8" width X 32 5/8" height

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 34"w X 4"h is the size for the duct opening measurement only

10" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_Black Versatile Compatibility: Our ceiling grills+ 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