18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening)

Matching OBD dampers

75"H – fits a 12" X 12" duct opening

Actual Filter Size – 31 3/4"w x 17 3/4" x 1"

Engineered for easy installation

18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 14" OR 14" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 13. 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