12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3-Way or 4-Way Actual Filter Size – 35

Actual Filter Size – 35 3/4"w x 27 3/4" x 1"

+ Product Details Size – 8" x 28" or 28" x 8" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 24 5/8" height

vibration-free performance

+ Product Details Size – 15" Wooden Corner Baseboard Grille

12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3-Way or 4-Way Actual Filter Size – 35+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 22" or 22" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 21. 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