18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in 85" width X 7

85" width X 7

actual front end outer dimensions are approximately 32 5/8" width X 14 5/8" height

Actual Filter Size – 19 3/4"w x 24 3/4" x 1"

85" width X 13

18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in 85" width X 7+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 30" OR 30" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 29. 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