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 & Compatibility – The 8" galvanized sheet metal straight transitioning duct boot is compatible with duct 8"

Carefully shrink wrapped with cardboard backing to prevent damage in shipment

With a 5-inch size

preventing tampering and maintaining consistent temperature settings

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