12"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] sidewall Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 9 3/4" x 1"

Simplified Installation: Our Butterfly Damper ensures easy setup

1/2" - 3119 PSI

+ Product Details Size - 24"w X 24"h X 2"d (for duct opening measurement only)

12"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] sidewall Actual Filter Size – 11+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 13. 75" width X 9. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a