Replacement filter value pack for Hunter HP600 Tall Tower Air Purifier. The Value pack includes two pre-filters and one True HEPA filter. Silver nanoparticles in the EcoSilver® pre-filter prevent the growth of microorganism on the filter, including bacteria and viruses True HEPA eliminates 99.97 percent of airborne particles as small as 0.3 microns including smoke, dust, pollen, pet dander, mold spores, and dust mite debris Coconut carbon filter removes VOCs (volatile organic compounds) and household odors from cooking, cleaning, smoking, and pets. Recommended to replace HEPA filter every 6 months and pre-filter every 3 months for maximum efficiency, or more often depending on air quality & environmental factors Dimensions: 18-1/2 x 6-2/10 x 1-2/10 inches (HEPA), 18-1/2 x 6-2/10 x 1/10 inches (Pre-Filter) What You Get: One Pack: Two (2) Pre-filters and One (1) True HEPA filter Two Pack: Four (4) Pre-filters and Two (2) True HEPA filter Three Pack: Six (6) Pre-filters and Three (3) True HEPA filter Fits Model Part Number HP600 H-HF600-VP HP600BL H-HF600-VP HP600GR H-HF600-VP HP600WH H-HF600-VP