12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover with filter making it a reliable choice

making it a reliable choice for improving indoor air quality

actual front end outer dimensions are approximately 18 5/8" width X 27 5/8" height

actual front end outer dimensions are 22" width X 6" height

The crank handle lever makes it easy to adjust to every weather situation

12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover with filter making it a reliable choice+ 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