Grayl UltraPress Replacement Cartridge is compatible with Grayl UltraLight and UltraPress. Replacement purifier cartridges for the UltraPressare designed to last 300 cycles (40 gal. / 150L). Lifespan will decline when purifying water with high levels of silt, sediment or tannins. Cartridge press time increases towards the end of the cartridge lifespan; when press time reaches 25-30 seconds, the cartridge should be replaced. Cartridge continues to protect, even as press time increases. Removes waterborne pathogens (viruses, bacteria, protozoan cysts), including Rotavirus, Hepatitis A, Norovirus, Giardiasis, Cryptosporidium, E. Coli, Cholera, Salmonella, Dysentery and more Filters: particulates (sediment, microplastics) and many chemicals, pesticides, and heavy metals Improves taste, smell and clarity Active Technology: Ion exchange and ultra-powdered activated carbon Antimicrobial: Yes Chemical-free: Yes Fast Flow Rate: 10 seconds per 16.9 fl oz (3 liters/minute) Size: 2.9" (7.3 cm) H