12" x 12" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w34h34 These Supply Diffusers with integral

These Supply Diffusers with integral round necks are recommended for heating

actual front end outer dimensions are approximately 32 5/8" width X 20 5/8" height

Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

+ Product Details Size – 32"w X 8"h is the size for the duct opening measurement only

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12" x 12" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w34h34 These Supply Diffusers with integral+ 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