8" x 8" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Color_R-4.2 Yellow + Product Details Size -

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 10"w X 10"h X 2"d (for duct opening measurement only)

Two Mounting Base Options – Includes both a solid base and a ring base

8" x 8" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Color_R-4.2 Yellow + Product Details Size -+ Product Details Size 8" X 8" 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