HQRP Active HEPA Filter compatible with Miele S4210 / S4580 / S4581 / S4780 vacuum cleaners plus HQRP Coaster HQRP&reg; Active Hepa Filter plus HQRP&reg; Coaster; This filter is HEPA filtration and retains 99.99% of particles down to 0.3 micron. 100% Compatible with Original filter; 2 weeks DOA replacement warranty!