18" X 36" Or 36" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 37.75] w30h30 Length of Electric Cord: 0

Length of Electric Cord: 0

this fitting is perfectly compatible with 7-inch ducts

Actual Front End Outer Dimensions Are 12" Diameter

+ Product Details Size – 8" x 16" or 16" x 8" is the size for the duct opening measurement only

18" X 36" Or 36" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 37.75] w30h30 Length of Electric Cord: 0+ Product Details Size 18"w X 36"h or 36" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 37. 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