28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 actual front end outer dimensions

actual front end outer dimensions are approximately 10 5/8" width X 18 5/8" height

The design eliminates noise and prevents louvers from vibrating

1/4" - 6518 PSI

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 14" OR 14" x 26" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 22" OR 22" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 21. 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