32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 75"H – fits a 24"

75"H – fits a 24" X 10" duct opening

actual front end outer dimensions are approximately 12 5/8" width X 18 5/8" height

guaranteeing efficient ventilation throughout your space

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

32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 75"H – fits a 24"+ 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