10" x 10" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12" Diameter + Product Details Size -

+ Product Details Size - 30"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 18 5/8" height

For a visual guide on how to measure your vent hole before ordering a grille

+ Product Details Size – 8"w X 24"h is the size for the duct opening measurement only

10" x 10" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12" Diameter + Product Details Size -+ Product Details Size 10" X 10" 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