HG Type Compatible Replacement Filter Cartridge for Kangen Enagic MW-7000HG SD501HG - for "HG" Original Model (Not Compatible with HG-N Models) Compatible HG-type Replacement Filter for Kangen Enagic Leveluk Toyo Ange Impart Compatible with HG Original Models - SD501HG MW7000 Leveluk Leveluk DX LevelukDXII Leveluk Jr Leveluk JrII Leveluk Super 501 Leveluk SD501 Not fit to HG-N models (Sold after Jan 1, 2011) PLEASE VERIFY whether the center hole of your previous filter is completely round. If it is, please order this item. But if it has two notches, please DONT buy this item. You need the HG-N type filter.