10"W X 10"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] flat stamped steel The grille features counter-sunk screw

The grille features counter-sunk screw holes that prevent paint from peeling during installation

actual front end outer dimensions are approximately 10 5/8" width X 12 5/8" height

Actual Filter Size – 27 3/4"w x 33 3/4" x 1"

+ Product Details Size – 10"w X 16"h is the size for the duct opening measurement only

10"W X 10"H [Duct Opening] 4-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] flat stamped steel The grille features counter-sunk screw+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are 11. 75" width X 11. 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.