Miele's HEPA AirClean Filter meets Europe's HEPA13 standards, capturing over 99.95% of all particles. This filter is the perfect match for any allergy or asthma sufferer. Once activated, a TimeStrip releases a red line of liquid over the course of one year, reminding users when it's time to replace their filter. This HEPA Filter is made to fit the Miele 300/400/500/600/2000/7000/Classic C1/Dynamic U1 Series.