24" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w6h6 + Product Details Size –

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

Design – removable door/face for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size - 10"w X 10"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening)

24" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w6h6 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 10" OR 10" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 9. 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