28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size –

+ Product Details Size – 24"w X 28"h is the size for the duct opening measurement only

Experience noise-free airflow and a healthier environment thanks to our grille's innovative design

actual front end outer dimensions are approximately 8

+ Product Details Size - 26"w X 4"h is the size for the duct opening measurement only

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

28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 14" OR 14" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 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