10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 18.5"] Return padding: 20px 14" Round Duct Pipe For 10 duct opening FR M 414 White

padding: 20px

actual front end outer dimensions are approximately 10 5/8" width X 26 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening)

6"w X 6"h 3-Way Fixed Curved Blade Air Supply Diffuser - Vent Duct Cover - Grille Register - Sidewall or Cieling - High Airflow - White

10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 12.5" X 18.5"] Return padding: 20px 14" Round Duct Pipe For 10 duct opening FR M 414 White padding: 20px actual front end outer dimensions are approximately 10 5 8" width X 26 5 8" height