28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 17 3/4" x 1"

actual front end outer dimensions are approximately 30 5/8" width X 24 5/8" height

+ Product Details Size – 6"w X 8"h is the size for the duct opening measurement only

this register is designed to last for years without rusting

3/8” - 4223 PSI

28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Wood Actual Filter Size – 15+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 16" OR 16" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 15. 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