20" X 50" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 52 5/8"] w20h20 This thoughtful design ensures optimal Product Details Perfect Fit MCSB1616 Blade

This thoughtful design ensures optimal air circulation for your HVAC system

+ Product Details Size – 36"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

Made from high-quality aluminum

20" X 50" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 22 5 8" X 52 5 8"] w20h20 This thoughtful design ensures optimal Product Details Perfect Fit MCSB1616 Blade This thoughtful design ensures optimal air circulation for your HVAC system + Product Details Size – 36"w X 18"h is the size for the duct opening measurement only