30" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille Designed with two mounting base

Designed with two mounting base options—solid and ring—it offers flexible installation

Locking Security System – Features a built-in eight-tumbler lock and a supplied key to prevent tampering and maintain consistent temperature settings

+ Product Details Size – 6" x 20" or 20" x 6" is the size for the duct opening measurement only

and smooth surface for years to come

30" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille Designed with two mounting base+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 7. 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