18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_R-8.0 Pink + Product Details Size –

+ Product Details Size – 28"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 10 5/8" height

Actual Filter Size – 29 3/4"w x 27 3/4" x 1"

actual front end outer dimensions are approximately 34 5/8" width X 12 5/8" height -

18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_R-8.0 Pink + Product Details Size –+ Product Details Size 18"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 10" 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