6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12in diameter Ideal for Walls & Ceilings:

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

High Quality ABS Plastic - Will Last Forever & NEVER RUST

By means of the smooth surface

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover 12in diameter Ideal for Walls & Ceilings:+ 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