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| Replacement pre-filter for Honeywell HEPA filter 21610 These odor control pre-filters come in a 2-Pack with attachment strips. These filters are precut to fit as an odor control pre-filter for Honeywells HEPA Filter part number 21610. Also fits Honeywell Enviracaire Filter Part Numbers: 11500 11502 11520 11525 11526 (EV15) 17200 17201 17210 18150 18159 26500 51500 61500 For maximum performance, replace pre-filters every 4 months. Filtera puts the "A" in filter! Call Filtera Toll-Free: (888) 933-0100 Monday - Friday 8:30 am to 5:00 pm central time |