Doulton Ultracarb ceramic carbon cartridge, 0.5 micron rating for treatment of Giardia and cryptosporidium cysts(99.999%) as well as LEAD and most harmful bacteria, E-coli, Cholera, Shigella, Salmonella, Klebsiella, Terrigena and others. Rated for 4,000 litres 9 ¾ Inch (248mm)
