+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)
+ Product Details Size - 34"w X 16"h is the size for the duct opening measurement only
+ Product Details Size - 20"w X 8"h is the size for the duct opening measurement only
+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening
actual front end outer dimensions are approximately 36 5/8" width X 28 5/8" height
12" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w8h8 + Product Details Perfect Fit+ Product Details Size 12"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 875" width X 12" 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
