10"W X 4"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] RV Mobile Home The first number in a

The first number in a grille size

complete with a set of sponge gasket and mounting frame

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

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

75"H – fits a 14" X 8" duct opening

10"W X 4"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] RV Mobile Home The first number in a+ Product Details Size 10"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are 11. 75" width X 5. 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