JJDD replacement HEPA pre-filter: replacement filter for HEPA and carbon cleaner for Coway AP1512HH AP-1512HH replaces part 3304899 filter air purifier captures up to 99.97 incredible percent of particles of 0.3 microns. Filters help foul folders, fine dust, mould, microbes, smoke, lint, pollen, bacteria, chemical vapours, provide fresh pure air. Replacing the carbin pre-filter extends the life of the HEPA filter. Durable, efficient and durable filter for your air purifiers. RECOMMENDED REPLACEMENT: Hepa Filiter, every 6 months; carbon pre-filter every 3 months to ensure maximum performance of your air purifiers, extend the life of your air purifiers. Dimensions: HEPA filter: H: 32 cm x L: 39.1 cm x W: 3.4 cm. Pre-filter: H: 32cm x L: 40cm x W: 0.17" Package includes: 1 x HEPA filter. 2 x pre-filters. 1 x cleaning brush. Note: These are not original replacement parts, please check the size and pistures carefully for compatibility before ordering.