12" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 8" Diameter + Product Details Size - Color_Brown LO2020 BR These won t hinder

+ Product Details Size - 26"w X 16"h is the size for the duct opening measurement only

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

actual front end outer dimensions are approximately 11

Actual Filter Size – 31 3/4"w x 7 3/4" x 1"

Its heavier gauge construction guarantees durability and longevity

12" X 10" [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 11.75"H] 8" Diameter + Product Details Size Color_Brown LO2020 BR These won t hinder + Product Details Size 26"w X 16"h is the size for the duct opening measurement only + Product Description Maximize the efficiency of your ventilation system with our top of the line HVAC grilles and registers