20" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 10" Diameter Insulation – A thick blanket

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

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

actual front end outer dimensions are approximately 28 5/8" width X 10 5/8" height

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875" width X 18" height

20" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 10" Diameter Insulation – A thick blanket+ Product Details Size 20"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 13. 75" 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