20" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 22 5/8" X 32 5/8"] Color_R-4.2 Yellow 9% Pure Copper meeting ASTM MFFG410-1 w6h6 actual front end outer

9% Pure Copper meeting ASTM B280 standards

+ Product Details Size - 22"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 32 5/8" width X 22 5/8" height -

Design – Removable door/face for easy filter change & cleaning - uses a 1" thick filter

20" X 30" Steel Return Air Filter Grille for 1" Filter Removable Frame Black [Outer Dimensions: 22 5 8" X 32 5 8"] Color_R 4.2 Yellow 9% Pure Copper meeting ASTM MFFG410 1 w6h6 actual front end outer 9% Pure Copper meeting ASTM B280 standards + Product Details Size 22"w X 36"h is the size for the duct opening measurement only