16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel Designed for optimal airflow and

Designed for optimal airflow and lasting durability

+ Product Details Size – 34"w X 36"h is the size for the duct opening measurement only

Tamper-Proof Security – Features a robust design to prevent unauthorized access and protect your thermostat settings

1-1/8" - 2334 PSI

16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel Designed for optimal airflow and+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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