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"] Copper Coil-Insulated Line Set + Product Details Size –

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

+ Product Details Size – 16" x 22" or 22" x 16" is the size for the duct opening measurement only

Lock and Key included

our grill boasts an impressive 96% airflow capacity

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"] Copper Coil-Insulated Line Set + Product Details Size –+ 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