30" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in Tamper-Proof Design – Provides robust

Tamper-Proof Design – Provides robust protection to prevent unauthorized access and ensure consistent thermostat settings

+ Product Details Size – 18"w X 14"h is the size for the duct opening measurement only

Filter Size - 15

75"H – fits a 16" X 16" duct opening

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

30" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in Tamper-Proof Design – Provides robust+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 32" OR 32" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 31. 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