30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 + Product Details Size - w6h6 actual front end outer MFFG410-1

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 30" Or 30" x 34" duct opening (measured at the opening)

With precise measurements and easy installation

Pre-flared ends with nuts are for simple and easy installation

30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 + Product Details Size w6h6 actual front end outer MFFG410 1 + Product Details Size 30"w X 14"h is the size for the duct opening measurement only + Product Details Perfect Fit & Easy Sizing Designed for a 34" x 30" Or 30" x 34" duct opening (measured at the opening)