6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12in diameter [Outer Dimensions: 18

[Outer Dimensions: 18

High Quality ABS Plastic - Will Last Forever & NEVER RUST

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 18" duct openings

+ Product Details Size - 10"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 24"h X 2"d (for duct opening measurement only)

6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12in diameter [Outer Dimensions: 18+ 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