6" X 12" or 12" X 6" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 7.75 X 13.75] 20 Feet Long Actual Filter Size – 29 Product Details Size 14 RG1612AL Height_16in

Actual Filter Size – 29 3/4"w x 29 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 12" OR 12" x 26" duct opening (measured at the opening)

hp-birdscreen-overlay')

Design – Rigid gauge ABS plastic

+ Product Details Size – 10"w X 24"h is the size for the duct opening measurement only

6" X 12" or 12" X 6" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 7.75 X 13.75] 20 Feet Long Actual Filter Size – 29 Product Details Size 14 RG1612AL Height_16in Actual Filter Size – 29 3 4"w x 29 3 4" x 1" + Product Details Perfect Fit & Easy Sizing Designed for a 26" x 12" OR 12" x 26" duct opening (measured at the opening)