HG-Type Replacement Filter Compatible for KANGEN Enagic MW-7000 Leveluk SD501 Toyo Ange Impart Water Ionizers Made by Magicos, Korean Ionizer and Filter Company /for Original Models (Sold before 2011) Highst Grade Activated Carbon Catridge/Made in Korea Compatible Models: Leveluk SD 501, DX, DX II, SD 501U, SD 501HG, Super 501, Jr., JR II, & SunUs Filtration Capacity: 12,000L (depending on the water quality)/Materials: Sediment / Activated Carbon / Non-Toxic ABS and PP NOT Compatible with HG-N type models Sold after Jan. 1, 2011 (SD 501 Platinum, SD 501 HG-N, etc) If your old filter has two notches on the center hole, PLEASE DON'T BUY THIS ITEM.