20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe Actual Filter Size – 21 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

+ Product Details Size – 25"w X 25"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

actual front end outer dimensions are approximately 22 5/8" width X 42 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening)

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe Actual Filter Size – 21 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 21 3 4"w x 17 3 4" x 1" + Product Details Size – 25"w X 25"h is the size for the duct opening measurement only