26" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe + Product Details Perfect Fit 14" Round Duct Pipe For 10 duct opening FR M 414 White

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 8" OR 8" x 24" duct opening (measured at the opening)

actual front end outer dimensions are approximately 24 5/8" width X 16 5/8" height

Actual Filter Size – 9 3/4"w x 7 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 32" OR 32" x 36" duct opening (measured at the opening)

26" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe + Product Details Perfect Fit 14" Round Duct Pipe For 10 duct opening FR M 414 White + Product Details Perfect Fit & Easy Sizing Designed for a 24" x 8" OR 8" x 24" duct opening (measured at the opening) actual front end outer dimensions are approximately 24 5 8" width X 16 5 8" height