18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w25h25 + Product Details Size -

+ Product Details Size - 20"w X 18"h is the size for the duct opening measurement only

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

helping to maintain consistent temperature settings

+ Product Details Size - 22"w X 32"h is the size for the duct opening measurement only

Pressure Rating: 2100 to 7000 PSI

18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w25h25 + Product Details Size -+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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