Katadyn Ultra Flow Replacement Cartridge Replacement Cartridge for Katadyn Gravity Camp 6L & Base Camp Pro 10L 0.2 micron Ultra Flow Filter Technology has a flow rate up to 2L/min Provides up to 1,500 liters of safe drinking water against bacteria, protozoan cysts and sediment Filter protector screen lengthens life of cartridge Includes sponge for cleaning filter protector screen