10" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 14 5/8"] Supply Grille actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 12 5/8" width X 36 5/8" height

+ Product Details Size – 20"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 24 5/8" height -

Actual Filter Size – 15 3/4"w x 33 3/4" x 1"

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10" X 12" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 12 5 8" X 14 5 8"] Supply Grille actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 12 5 8" width X 36 5 8" height + Product Details Size – 20"w X 36"h is the size for the duct opening measurement only