18" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 Actual Filter Size – 9

Actual Filter Size – 9 3/4"w x 7 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 32" OR 32" x 28" duct opening (measured at the opening)

75" width X 33

actual front end outer dimensions are approximately 10 5/8" width X 14 5/8" height

making it compatible with most thermostat models

18" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 Actual Filter Size – 9+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 16" OR 16" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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