6" x 6" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Width_20in actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 34 5/8" height

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

+ Product Details Size - 4"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 18"h is the size for the duct opening measurement only

6" x 6" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Width_20in actual front end outer dimensions+ Product Details Size 6" X 6" is the size for the duct opening measurement only, actual front end outer dimensions are 3". Design Equipped with lever for full airflow control; back blades made of black plastic for reduced air noise and discreet appearance; "Opposing" back blades, ensuring they don't overlap, provide precise damper control and superior air dispersion. High Quality Aluminum The premium durable aluminum will never rust and it will never