18" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 20 5/8"] white Our grilles feature a durable Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Our grilles feature a durable powder-coat finish

+ Product Details Size - 25"w X 20"h is the size for the duct opening measurement only

R Value Rating of Insulation - R3

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actual front end outer dimensions are approximately 10 5/8" width X 28 5/8" height

18" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 20 5 8" X 20 5 8"] white Our grilles feature a durable Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Our grilles feature a durable powder coat finish + Product Details Size 25"w X 20"h is the size for the duct opening measurement only