34" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white It features an eight-tumbler lock

It features an eight-tumbler lock with a supplied key for secure access

+ Product Description Upgrade your HVAC system with our 5" Round Air Vent Supply Grille

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 32" OR 32" x 18" duct opening (measured at the opening)

Actual Filter Size – 25 3/4"w x 31 3/4" x 1"

+ Product Details Size – 2"w X 14"h is the size for the duct opening measurement only

34" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white It features an eight-tumbler lock+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 18" Or 18" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 17. 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