18" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Aluminum Bar Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

+ Product Details Size - 30"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22" width X 16" height

[Outer Dimensions: 22

18" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Aluminum Bar Actual Filter Size – 33+ Product Details Size 18"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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