Filter-Monster - H-HF800-VP Replacement Filter/ Pre-Filter Value Pack for Hunter HP800 Air Purifier Series - 4 Pre-Filters and 1 Filter

Package contains 1 replacement filter and 4 pre-filters Recommended to replace filter every 6 months and pre-filter every 3 months for maximum efficiency, or more often depending on air quality & environmental factors Compatible with Hunter Air Purifier models: HP800, HP800BL, HP800WH, HP800GR Approximate Measurements: 18 x 2.5 x 18.75 inches