26" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_R-8.0 Pink + Product Details Size –

+ Product Details Size – 34"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 18 5/8" height

+ How To Measure A Round Vent Overall Size:

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

26" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_R-8.0 Pink + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 10" OR 10" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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