6" x 6" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover fixed bar the actual front end outer

the actual front end outer dimensions are 7" in diameter

These are built heavy duty for installation into brick and cement walls

actual front end outer dimensions are approximately 12 5/8" width X 26 5/8" height

Actual Filter Size – 27 3/4"w x 23 3/4" x 1"

6" x 6" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover fixed bar the actual front end outer+ 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