8" X 4" Adjustable AIR Supply Diffuser - HVAC Vent Cover Sidewall or Ceiling - Grille Register - High Airflow - Black Fixed Blades actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 28 5/8" height

+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only

75"H – fits a 18" X 18" duct opening

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

8" X 4" Adjustable AIR Supply Diffuser - HVAC Vent Cover Sidewall or Ceiling - Grille Register - High Airflow - Black Fixed Blades actual front end outer dimensions+ Product Details Size 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 875" width X 6" 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