Keep your Vacuum operating at !Our maintenance kit has everything you need, including HEPA Filters Item fits for DX118C DX128C Portable Vacuum Cleaner The filter can fine dust with a diameter of 0.3 Micrometres or more, effectively filter pet hair, dust, dander and other pollutants, promote exhaust, no secondary pollution. For best results, filters should be replaced every 2 - 3 months. It can be easy to remove and replace as part of routine maintenance.