10"W X 8"H [Duct Opening] Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 11.75"W X 9.75"H] Aluminum Bar + Product Details Size -

+ Product Details Size - 30"w X 2"h is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 9 3/4" x 1"

For 14" Round Duct Opening - Spiral or Flex

+ Product Details Size - 14"w X 14"h is the size for the duct opening measurement only

10"W X 8"H [Duct Opening] Never Rust Plastic 2-Way-Vertical Air Supply Register - HVAC Vent Duct Grille - Off White [Outer Dimensions: 11.75"W X 9.75"H] Aluminum Bar + Product Details Size -+ Product Details Size 10"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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