12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" with actual outer dimensions of

with actual outer dimensions of 32

actual front end outer dimensions are approximately 23

+ Product Details Size - 36"w X 36"h X 2"d (for duct opening measurement only)

Actual Filter Size – 29 3/4"w x 15 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 28" OR 28" x 24" duct opening (measured at the opening)

12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" with actual outer dimensions of+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 26" or 26" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 25. 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