Perfect for a small group, the award winning Katadyn Vario is a powerful companion in a small, lightweight package. This variable filter offers higher output or longer life, your choice! When you are out there you need a solid water filtration system. The Katadyn Vario offers superb Filtration removing Microorganisms,(0.3 micron) Bad Tastes and Chemicals. Effective protection from Bacteria, Protozoa, cysts, and sediments. The VARIO will Pump 1 Liter / minute through the Ceramic and Micro Filter for turbid surface water or adjust the flow speed for clear rapid water and It will pump 2 Liters /Minute. You can clean the filters in the field and expected life is 2000 Liters. You can buy replacement filters down the trail if you have 2000 liters of pumping planned. :o Base with thread directly on to most popular branded Water Bottles ( Nalgene ) or Hydration Bladders ( CamelBak ) Multi-Stage Filtration System: A simple turn adjusts the filter for longer life in dirty water or maximum flow in normal conditions Carbon Core: Reduces chemicals and improves taste of treated water Dual Action Pump: Easy to operate dual piston technology provides continuous output with minimum effort Adaptor Base: Attaches directly to water bottles or output hose and can be used to fill hydration systems or large containers 0.3 Micron high surface area pleated glassfiber microfilter removes waterborne bacteria and cysts Replaceable carbon core reduces chemicals, pesticides and bad taste in water Passes US EPA tests for filtering Bacteria (Klebsiella) 99,9999% & Protozoa (Giardia Cryptosporidium) 99.9% Output: Approx. 2 qt (2 litres) per minute Capacity: Up to 530 gallons (2000 ltrs.) depending on water quality Weight: 425g Dimensions: 19 x 10cm Hose: 92cm Key Benefit: Works in any water condition Won Gear of the year award in 2007