16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Perfect Fit CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

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

rust-free aluminum construction with smooth finished edges and counter-sunk screw holes (screws included)

Actual Filter Size – 24 3/4"w x 15 3/4" x 1"

the actual front end outer dimensions are 8" in diameter

16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Perfect Fit CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling + Product Details Perfect Fit & Easy Sizing Designed for a 18" x 18" duct opening (measured at the opening) + Product Details Size – 24"w X 24"h is the size for the duct opening measurement only