16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set actual front end outer dimensions Suitable for all AC 8in diameter 12125SDCLNGBX

actual front end outer dimensions are approximately 34 5/8" width X 12 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 30" OR 30" x 24" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 20" duct opening (measured at the opening)

+ Product Spec Sheet Aluminum Return Grille Spec Sheet

16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Copper Coil Insulated Line Set actual front end outer dimensions Suitable for all AC 8in diameter 12125SDCLNGBX actual front end outer dimensions are approximately 34 5 8" width X 12 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 24" x 30" OR 30" x 24" duct opening (measured at the opening)