16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades These are built heavy duty

These are built heavy duty for installation into brick and cement walls

with actual outer dimensions of 8

Design – rigid gauge built for durability and long life in mind

and the included installation screws make setup simple and efficient

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

16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades These are built heavy duty+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 10" OR 10" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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