GRAVITY CAMP & BASE CAMP PRO ULTRA FLOW MICROFILTER CARTRIDGE. Works with Katadyn Gravity Camp 6L and Base Camp Pro 10L Microfilter Systems for removing bacteria and cysts such as Giardia & Cryptosporidium. 0.2 micron Ultra Flow Filter pleated glassfiber. A cleanable filter protector lengthens the lifetime of the filter element so it can clean up to 1,500 liters of water. Suited for turbid conditions.