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] Aluminum Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 29 3/4" x 1"

High Quality – Solid rigid steel body for durability and reliability with dampers operable by switch for airflow directional control

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

This thoughtful design ensures optimal air circulation for your HVAC system

actual front end outer dimensions are approximately 16 5/8" width X 36 5/8" height

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] Aluminum Actual Filter Size – 25+ 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.