12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 16.5"] Return Grille Energy Efficient – Air-tight inner

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

cursor: pointer

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 36" or 36" x 12" duct opening (measured at the opening)

+ Product Details Size – 15" Wooden Corner Baseboard Grille

Actual Filter Size – 33 3/4"w x 33 3/4" x 1"

12" x 14" or 14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 16.5"] Return Grille Energy Efficient – Air-tight inner+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 14" or 14" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 13. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum