WaterBasics Kit Replaceable Series II filter has 80 gallon capacity Ideal for back-country use, recreation, travel and emergency Filter removes Cryptosporidium, Giardia, and bacteria Reduces Chlorine and Chemicals Improves Water Taste, Odor and Clarity GRN Line Biological Protection Removes bacteria, and protozoan cysts such as Cryptosporidium, and Giardia Reduces chlorine and chemicals Improves water taste, odor, and clarity Accepts any WaterBasics Series II replacement filter Gravity does the work Compact kit includes everything you need to collect, filter, store and dispense life saving water.