36" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 20 5/8"] Color_R-4.2 Yellow but still very thin actual front end outer RG1612AL Compatible with Duct 4"
Baker’s notes & crumb story
Description
but still very thin
actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height
or just adding updated elements to your current home
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+ Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only
36" X 18" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 38 5 8" X 20 5 8"] Color_R 4.2 Yellow but still very thin actual front end outer RG1612AL Compatible with Duct 4" but still very thin actual front end outer dimensions are approximately 12 5 8" width X 12 5 8" height