8" X 14" Or 14" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 15.75] R-6.0 insulation + Product Details Size –

+ Product Details Size – Duct end cap is 18" X 10" | 26-gauge galvanized steel end cap

+ Product Details Size – Sheet metal duct board take off start collar is 12" and it is compatible with duct 12"

+ Product Details Size & Compatibility – The size of galvanized sheet metal straight floor boot is 10" X 6" X 7"

providing a perfect fit for most standard thermostats

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8" X 14" Or 14" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 15.75] R-6.0 insulation + Product Details Size –+ Product Details Size 8"w X 14"h or 14" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 15. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully