Fits most Honeywell models, including series 10000, 11000, 12000, 13000, 14000, 15000, 17000, 18000, 40000, 50000, and 60000. * Universal Cut-to-Fit activated carbon pre-filter helps remove large particles and reduce common household odors. * The 38002 replaces the following pre-filters: 12520, 31002, 32002, 33002, 34002, and 35002. * Makes 1 to 3 pre-filters depending on the model. * Large 15-3/4" x 48" cut-to-fit activated carbon sheet!