30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w28h28 Filter Size - 25

Filter Size - 25

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 16" or 16" x 10" duct opening (measured at the opening)

Filter Size - 35

actual front end outer dimensions are approximately 27 5/8" width X 16 5/8" height

Installation Location – Wall or door mount - door thickness up to 32mm - anodised finish - smooth & beautiful

30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w28h28 Filter Size - 25+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 11. 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