AD 56384898 Vacuum Filter for Nilfisk Advance. Fits many popular models including, but not limited to, Champion 28, GU700A, Carpetriever 28, Convertamatic 28LX / 285LX / 32B / 32BD / 38BD, Hydro Retriever 200HD / 285HD / 320HD / 320BHD / 380HD / 380BHD,...