16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Front End Outer Dimensions

Actual Front End Outer Dimensions Are 42" Width X 18" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

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

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

+ Product Details Size - 20"w X 28"h is the size for the duct opening measurement only

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

16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Front End Outer Dimensions+ 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