36" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Round Duct Pipe Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 25 3/4" x 1"

actual front end outer dimensions are approximately 26 5/8" width X 16 5/8" height

actual front end outer dimensions are 7

+ Product Details Size – 22"w X 29"h is the size for the duct opening measurement only

Design – Circular air supply valves - designed to be used in low and medium pressure ventilation air conditioning systems

36" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Round Duct Pipe Actual Filter Size – 21+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 32" OR 32" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 31. 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