Compatibility: this filter is compatible with for vacuum cleaner Unlimited Gen2 Series 8 (BSS825CARP) (not for Series 6). Compatible number: 12023349. Suitable for models: BBS1, BBS8, BCS1, BCS8, BKS8. Please confirm your vacuum cleaner model before purchase Focus on Fine Cleaning This replacement filter is specially designed for large spaces such as living rooms, offices, factories, kitchens, etc. Good HEPA filtration can improve the efficiency of the vacuum cleaner, expand the absorption range and help absorb pet food, accumulated oil, fibers, hair, pollen, flying dust and tiny particles Good Air Circulation The replacement filter is a true HEPA filter, which can precisely filter particles up to 0.3 microns in size and has a filter performance of up to 99.97%. It also helps keep dust out while ensuring a better air circulation system. Noise reduction of at least 20 dB Easy to use: just turn the knob in the middle and replace the new filter, use it while keeping it dry, wait for it