30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 34" OR 34" x 36" duct opening (measured at the opening)

actual front end outer dimensions are approximately 34 5/8" width X 10 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 10" duct openings

+ Product Details Size – 20"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 30 5/8" height

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 + Product Details Perfect Fit Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Perfect Fit & Easy Sizing Designed for a 36" x 34" OR 34" x 36" duct opening (measured at the opening) actual front end outer dimensions are approximately 34 5 8" width X 10 5 8" height