One pack, each pack contains One Filter. One Post Motor Odor Neutralizing HEPA vacuum filter with Activated Charcoal by Envirocare Technologies for use in Dyson DC07 and DC14 vacuums. Additional Details ------------------------------ Product description: Contact me if you are interested in larger wholesale quantities of this or other products. Fits original manufacture part numbers below: #904979-02 (DC07 only), 905401-01(DC14 only) Replaces Original Dyson Part Numbers: 901420-02, 90142002, DC-07-14 Part #10-2310-05 Designed to fit the vacuum models listed below and more: Dyson Vacuums: Style Model Numbers All Floors DC07/DC14 Low Reach DC07/DC14 Animal DC07/DC14/ Full Gear DC07/DC14/ All Floor HSN Exclusive DC18 Dimensions: Diameter 5 oe?, Height 1 5/8? HEPA Filtration system traps and seals-in 100% of Microscopic Particles, Bacteria, Dust Mites, Mold, pollens, allergy causing agents, and Germs as small as 0.1 micron and 99.9% of pet dander Cleaning and replacing filters regularly extends the life of your vacuum. If the suction power of your vacuum seems to be less, changing the filter might be a good option and help you avoid costly repairs. Although this filter is lifetime, experience has shown that it should be inspected at least once a year. Use a flat head screwdriver to remove the filter. If you notice black soot starting to accumulate, consider replacing the filter. Do Not wash this filter because the material is so dense it is difficult to dry; the moisture may damage your motor.