32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white Noise free components - No

Noise free components - No vibrating louvers etc

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

+ Product Details Size – 8" x 30" or 30" x 8" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 12" OR 12" x 26" duct opening (measured at the opening)

875" width X 12" height

32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter white Noise free components - No+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 35. 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