26" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 The permanently attached eight-tumbler lock

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

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

designed for superior airflow control and noise-free operation

Actual Filter Size – 25 3/4"w x 5 3/4" x 1"

+ Product Spec Sheet 2-Way Wall/Ceiling Register Spec Sheet

26" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 The permanently attached eight-tumbler lock+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 25. 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 Made from