From the producer Culligan RC-EZ-4 EZ-Change Level 4 Replacement of the cartridge is a filter for drinking water alternatives that reduce the bad taste and smell, taste and smell of chlorine, sediment, lead, and cysts such as Cryptosporidium and Giardia, Mercury, turbidity, particulate class I, VOC, MTBE and chloramines. Change easily and icemaker refrigerator water dispenser spare cartridges Level 4 Filtration Premium. Reduces: bad taste and smell, taste and smell of chlorine, sediment, lead, cysts such as Cryptosporidium and Giardia, mercury, turbidity, particularly