8" X 8" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 9.75"W X 9.75"H] Material_Aluminum Pressure rating: 2300 to 6500

Pressure rating: 2300 to 6500 psi

actual front end outer dimensions are 19" Width X 13" Height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 20" duct opening (measured at the opening)

this thermostat guard is compatible with most standard thermostat models

actual front end outer dimensions are approximately 28 5/8" width X 32 5/8" height

8" X 8" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 9.75"W X 9.75"H] Material_Aluminum Pressure rating: 2300 to 6500+ Product Details Size 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 9. 75" width X 9. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. 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