36" x 25" Steel Return Air Filter Grill for 1" Filter Removable Face/Door 5" Diameter + Product Details Includes 28

+ Product Details Includes 28 Rods

75" Plenum Box Depth 5

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} + Product Details Size & Compatibility - The size of a boot register end is 12" X 2

36" x 25" Steel Return Air Filter Grill for 1" Filter Removable Face/Door 5" Diameter + Product Details Includes 28+ Product Details Size 36"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 27 5 8" height Actual Filter Size 35 3 4"w x 24 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.