16" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 14" Round Duct Pipe + Product Details Size -

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 9 3/4"w x 17 3/4" x 1"

+ Product Details Size – 28"w X 10"h is the size for the duct opening measurement only

180 Degrees Double Direction Adjustable - Fins Are Manually Adjustable Individually for Optimal Air Distribution

16" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 14" Round Duct Pipe + Product Details Size -+ Product Details Size 16"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 875" width X 14" 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