14" X 16" or 16" x 14" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 15.75 X 17.75] Galvanized Steel + Product Details Size –

+ Product Details Size – Stick-on collar is 8" and it is compatible with duct 8"

+ Product Details Size & Compatibility – The size of the wall angle register boot is 12" X 4" X 7" and it is compatible with duct 7"

+ Product Details Size & Compatibility – The size of the side round ceiling box is 8" X 8" X 6" and it is compatible with duct 6"

Designed for sidewall and ceiling installation with included screws

+ Product Details Size & Compatibility – The 5" galvanized steel metal stick on take-off is compatible with duct 5"

14" X 16" or 16" x 14" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 15.75 X 17.75] Galvanized Steel + Product Details Size –+ Product Details Size 14"w X 16"h or 16" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" width X 17. 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