14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection The permanently attached eight-tumbler lock

The permanently attached eight-tumbler lock with a supplied key adds an extra layer of security

[Outer Dimensions: 16

Designed for optimal airflow and lasting durability

our damper is designed to perfectly align with your setup

+ Product Details Size – 10"w X 20"h is the size for the duct opening measurement only

14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection The permanently attached eight-tumbler lock+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 12" or 12" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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