10" X 10" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] Powder-Coat This versatile guard features air 4 X 12 Is CRFG2028 Width_14in

This versatile guard features air circulating ports on all four sides to allow proper airflow

+ Product Details Size - 32"w X 36"h is the size for the duct opening measurement only

Design – Unrestricted airflow For Your HVAC system - noise free components - no vibrating louvers etc

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

Width vs Height:

10" X 10" [Duct Opening] 3 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] Powder Coat This versatile guard features air 4 X 12 Is CRFG2028 Width_14in This versatile guard features air circulating ports on all four sides to allow proper airflow + Product Details Size 32"w X 36"h is the size for the duct opening measurement only