8"W X 4"H [Duct Opening] Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 9.75"W X 5.75"H] Color_Red Oak this guard fits almost any

this guard fits almost any thermostat and blends seamlessly into any setting

Secure Locking Mechanism – Features a permanently attached eight-tumbler lock with a supplied key for added security

Our innovative adjustable design changes the game

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

And is classified as Class 1 Fire Proof - B1

8"W X 4"H [Duct Opening] Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 9.75"W X 5.75"H] Color_Red Oak this guard fits almost any+ Product Details Size 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 5. 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