6" X 18" or 18" x 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 19.75] Rectangular Duct Caps Applications – This oval-to-round elbow

Applications – This oval-to-round elbow provides a transition from a round pipe or insulated flex duct to oval ducting

+ Product Details Size & Compatibility – The size of the side round ceiling box is 6" X 6" X 5" and it is compatible with duct 5"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 32" OR 32" x 30" duct opening (measured at the opening)

our grill boasts an impressive 96% airflow capacity

6" X 18" or 18" x 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 19.75] Rectangular Duct Caps Applications – This oval-to-round elbow+ Product Details Size 6"w X 18"h or 18" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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