Extend the life of your Xiaomi Vacuum Cleaner G10+ or G9+ with the Xiaomi Vacuum Cleaner G10+/G9+ Filter Pack. It features 2x filters made out of highly densified materials, which allow for securing clean air during vacuuming. The pre-HEPA filter works as the first barrier to stop big particles, it also helps to lengthen the lifetime of the HEPA filter. Pre-HEPA filters are recommended to be changed every 9 months.