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] w16h16 Actual Filter Size – 19

Actual Filter Size – 19 3/4"w x 9 3/4" x 1"

+ Product Details Size – 32"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 20 5/8" height

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

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] w16h16 Actual Filter Size – 19+ 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.