18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Compatible With Duct 8in actual front end outer dimensions

actual front end outer dimensions are approximately 14 5/8" width X 28 5/8" height

Crafted from robust 1680D ballistic nylon and equipped with 5 strong magnets

+ Product Details Size – Stick-on collar is 7" and it is compatible with duct 7"

Crafted from heavy-duty reinforced steel

This 12" X 12" end cap is constructed with 26-gauge galvanized steel

18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Compatible With Duct 8in actual front end outer dimensions+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 19. 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 shrink