34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Size - 10"w X 10"h

Size - 10"w X 10"h is the size for the duct opening measurement only

providing the flexibility to match specific ventilation requirements or personal comfort levels

Easy clean Healthy air flow for your HVAC system - noise free components - no vibrating louvers etc

+ Product Details Size - 34"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 24 5/8" height

34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Size - 10"w X 10"h+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 8" Or 8" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 7. 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