12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover with filter + Product Details Size –

+ Product Details Size – 40"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 21 3/4" x 1"

3/4" - 2981 PSI

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Works for every air conditioning & refrigeration application including ductless mini-split

12" x 12" - Corner Direction Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover with filter + Product Details Size –+ 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