18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_R-4.2 Yellow + Product Details Size -

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

Designed for both wall and ceiling applications

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 30" OR 30" X 14" duct opening (measured at the opening)

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_R-4.2 Yellow + 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