26" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades you have 16 different varieties

you have 16 different varieties to choose from

The crank handle lever makes it easy to adjust to every weather situation

Actual Filter Size – 15 3/4"w x 19 3/4" x 1"

+ Product Details Size - 34"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 12"h is the size for the duct opening measurement only

26" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades you have 16 different varieties+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 36" OR 36" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 35. 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