24" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 Crafted from high-quality red oak

Crafted from high-quality red oak wood

+ Product Details Size - 36"w X 10"h is the size for the duct opening measurement only

Choose our premium HVAC grilles and registers for long-lasting durability

actual front end outer dimensions are approximately 38 5/8" width X 16 5/8" height -

+ Product Details Size - 14"w X 24"h is the size for the duct opening measurement only

24" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 Crafted from high-quality red oak+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 34" OR 34" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 33. 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