16" X 18" or 18" x 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 19.75] 6" Round Duct Pipe + Product Details Size -

+ Product Details Size - 24"w X 14"h X 2"d (for duct opening measurement only)

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

actual front end outer dimensions are approximately 27 5/8" width X 38 5/8" height

If you are looking for perfect-fitting ceiling boxes to enhance your project look no further than HVAC Premium

16" X 18" or 18" x 16" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 17.75 X 19.75] 6" Round Duct Pipe + Product Details Size -+ Product Details Size 16"w X 18"h or 18" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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