24" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter + Product Details Size -

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

Designed to seamlessly integrate with T-Bar vent covers in drop ceiling setups

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height

+ Product Details Outer dimensions: 13

+ Product Details Size – 25"w X 26"h is the size for the duct opening measurement only

24" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 26" OR 26" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 25. 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