Media replacement cartridge, for furnaces with filter cavities approximately sized 20 inches x 20 inches x 1 inches.

Actual measurements of filter: 19.5 inches by 19.5 inches by 0.75 inches.

Filter may be smaller than cavity to account for installation differences, but the size will not reduce the filter's effectiveness.

MERV 8 rating.

Fits most Honeywell, Carrier, and Lennox furnaces.

Original part number; SC40-20X20X1, 20x20x1, 80055.012020, 12020BPFTPR, S77P.