6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 18.5"] w30h30 One Towards The Top Of SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe

One Towards The Top Of The Door

+ Product Details Size - 22"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 21 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 6" OR 6" X 18" duct opening (measured at the opening)

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

6" x 16" or 16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 8.5" X 18.5"] w30h30 One Towards The Top Of SV2414 HP Product Details Perfect Fit 12" Round Duct Pipe One Towards The Top Of The Door + Product Details Size 22"w X 28"h is the size for the duct opening measurement only