18" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter White Installation – Easy to Install

Installation – Easy to Install

10"w X 6"h Is The Size For The Duct Opening Measurement Only

but you will appreciate the benefits over the period of time

is fireproof and ensures efficient thermal performance

actual front end outer dimensions are approximately 10 5/8" width X 20 5/8" height

18" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter White Installation – Easy to Install+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 12" OR 12" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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