14" x 14" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover return filter + Product Details Size -

+ Product Details Size - 18"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 18"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 12"h X 2"d (for duct opening measurement only)

Actual Filter Size – 25 3/4"w x 33 3/4" x 1"

14" x 14" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover return filter + Product Details Size -+ Product Details Size 14" X 14" 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