20"W X 20"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 21.75"W X 21.75"H] White Carefully packaged for protection during

Carefully packaged for protection during shipment

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

Please check the measuring guide to ensure a proper fit

actual front end outer dimensions are 25" Width X 19" Height

+ Product Details Size - 16"w X 25"h is the size for the duct opening measurement only

20"W X 20"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 21.75"W X 21.75"H] White Carefully packaged for protection during+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are 21. 75" width X 21. 75" height. Design Individually adjusting curved blades for better air flow control. 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 luxurious touch to any home.