OEM# 52100 2 of # 30563a 2-Pack For many Nilfisk Advance, ReliaVac, Eureka, Sanitaire, Electrolux and Euroclean Upright Models 600, 1400, 1900, 2000, 2100, 4000, 5000-5175, 400 and 7500 series. CLARK S12 # SL12305, Euroclean PS12 52100B, 52100C, 52100D, 52100A, 30563