26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Compatible with Duct 10" Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 28 5/8" width X 34 5/8" height

Weather and Pest Proof – These louvers are especially designed to prevent water from entering your home

Installing the plaster frame is effortless – secure it into your sheetrock

actual front end outer dimensions are approximately 22 5/8" width X 14 5/8" height

26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Compatible with Duct 10" Actual Filter Size – 11+ Product Details Size 26"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 875" width X 20" 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