12"W X 8"H [Duct Opening] Never Rust Plastic 3-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 13.75"W X 9.75"H] Material_Aluminum actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 18 5/8" height

Fit – Adjustable and universal Nylon Belt for a comfortable fit on any waist

+ Product Details Size - 30"w X 20"h is the size for the duct opening measurement only

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+ Product Details 16" x 16" x 1" replacement air filters for your furnace

12"W X 8"H [Duct Opening] Never Rust Plastic 3-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 13.75"W X 9.75"H] Material_Aluminum actual front end outer dimensions+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 9. 75" height. Design Rigid gauge ABS plastic. Rigid gauge built for durability and long life in mind, but still light and handy. Powder coat finish. Smooth, scratch resistant, beautiful. Looks like new after years of use. Screws Included High Quality High quality ABS plastic will never rust, no sharp