12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Compatible with Duct 10" this solid-base guard ensures long-lasting

this solid-base guard ensures long-lasting performance with minimal hassle

actual front end outer dimensions are 19" Width X 11" Height

+ Product Description Upgrade your HVAC system with our 6" Round Air Vent Supply Grille

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening)

12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Compatible with Duct 10" this solid-base guard ensures long-lasting+ Product Details Size 12" X 12" 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