This is "HG-N" Premium filter(Not Lead removal).This advanced multi-stage activated carbon filter is designed to effectively remove chlorine, sediments, and odour from your tap water.Provides clean, great-tasting water.Made in Korea.It is compatible with all Leveluk series, DX, Jr., SD-501, DXII, Jr.II, Super 501 and Sunus (HG-N Newer model only), all Sanastec and Impart and most Toyo water ionisers.By replacing new filter every 6 to 12 months will enhance the taste and alkalinity of your water.This filter will not fit to Older HG model.It is very important to choose the right filter for your water ioniser.If your filter tray has two extra notches in the centre hole (outlet) and not completely round, you have the HG-N type filter and this filter will fit to your machine.If your filter centre nipple is completely round, you need to buy 'HG' filter.Please verify whether you have the original model filter or the new HG-N model filter.Returns accepted if the item is still new and unused.Made in Korea