16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 + Product Details Size -

+ Product Details Size - 32"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 12" x 26" or 26" x 12" is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 5 3/4" x 1"

Installing the plaster frame is effortless – secure it into your sheetrock

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 30" OR 30" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 29. 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