MaximalPower VF MIE 68850 x 2 Miele SF-HA 50 Active HEPA Vacuum S4000 S5000 S6000 S7000 S8000 AH50 Replacement Filter 100% Compatible with original manufacturer equipment. Fits S4 series, S5 series, S6 series, and S8 series Traps 99.95% of all particles as tiny as 0.3 microns Needs to be replaced after 50 hours of use, or approximately 12 months.