36" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 +How To Measure A Grille

+How To Measure A Grille Overall Size:

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 18" Or 18" x 34" duct opening (measured at the opening)

High Quality – No sharp surface edges

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

36" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 +How To Measure A Grille+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 32" OR 32" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 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