Honeywell C-6005 38002 Enviracare Universal Replacement Pre-Filter Honeywell 38002 Evercare Universal Replacement Pre Filter. Features UNIVERSAL PRE-FILTER: This replacement pre-filter for Honeywell HEPA air purifier models fits most Honeywell Round, QuietCare, SilentComfort Series models. For best results replace every 3 months. TRAP DIRT REDUCE ODORS: This pre-filter traps more dirt than standard carbon filters helps reduce common household odors. It can be cut to fit to make 1 to 3 pre-filters, depending on your model. FILTER CIRCULATE: Honeywell Air Purifiers filter circulate air in the stated room size up to 5 times an hour. Breathe easy knowing the air in your home is fresher cleaner with fewer allergens. HONEYWELL QUALITY REPLACEMENT FILTERS: For best performance use only genuine Honeywell Replacement filters. Each air purifier's performance is tested as a system with the filters for best efficiency. HONEYWELL QUALITY: Improve your air quality neutralize odors for a clean healthy breathing experience year round with Honeywell replacement filters for air cleaners, purifiers humidifiers. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.