The E2 filter filters out dust and other airborne particles. Contains 2 vacuum filters. Fits Ergorapido EL2000 Series Lightweight Stick vacuums and Rapdio EL800 Series Hand Vacs. Fits EL2001A Ergorapido® Essence EL2003A Ergorapido RealTree EL2010A Ergorapido® Plus EL2021A Ergorapido® Plus Brushroll Clean EL2022A Ergorapido® Plus Brushroll Clean EL2023AX Ergorapido® Plus Brushroll Clean EL2024AX Ergorapido® Brushroll Clean EL2029A Ergorapido® Power EL2029AE Ergorapido® Power EL2030A Ergorapido® Power EL2040A Ergorapido® Power Ion EL2050A Ergorapido® Lithium Ion Plus EL2053A Ergorapido Lithium Ion Limited Edition EL2055A Ergorapido® Lithium Ion Plus EL2055B Ergorapido® Lithium Ion Plus EL2081A Ergorapido Lithium Ion Brushroll Clean Xtra EL2089A Ergrorapido Lithium Ion Brushroll Clean Xtra EL2095A UltraPower™ Studio EL820A Rapido® Power Replaces part # EF144, EL65521.