Amazon.com The Katadyn TRK Drip Ceradyn free-standing gravity filter features a 10 liter water container for large quantities of water. It's ideal for the water supply for camps, cabins and homes without running water. This Ceradyn version comes with three ceramic filter elements. Ceramic filters have a micro porous structure with impregnated silver which delays the growth of bacteria. The pore-size of Katadyn ceramic filters is 0.2 micron (0.0002 mm). Bacteria range in size from 0.2 to 5 micron and, like protozoa (1 to 15 micron), are efficiently filtered out. Ceramic filters can be mechanically regenerated and the filter capacity is measurable. Specifications: Technology: 0.2 micron ceramic depth filter Output: ca. 4 liters/hour Cartridge Capacity: Up to 150'000 l (depending on water quality) Weight: ca. 3.3 kg Size: 25 x 45 cm (9.8 x 17.7 inches) Why Treat Water? A crystal-clear stream or lake usually contains microorganisms that can make you sick. Water contaminants like protozoa, bacteria and viruses, can cause serious illness. Optimize your travel preparation and use a portable drinking water system from Katadyn. About Katadyn Katadyn of Switzerland has been producing high quality portable water systems since 1928. Their history has been one of innovation and durability. Katadyn products are used by militaries, health organizations and outdoor adventurers world-wide. No other water system provides higher quality or longer lasting performance. Katadyn is the global leader in portable water treatment. With subsidiaries in the United States, Germany, France, and Singapore; Katadyn develops, produces and distributes high quality products which are used whenever safe drinking water isn't available--for travel, camping and humanitarian operations. Product Description The Katadyn TRK Ceradyn Microfilter is a gravity feed filter which requires no pumping, hookup, or electricity. Fill the upper compartment with up to 2. 5 gallons of untreated water, and it literally drips through the 0. 2 micron ceramic filter elements into the bottom compartment. Simply set it on a counter in the corner and keep it filled. The Katadyn Ceradyn water filter is the way to go for cabins, base camps, recreation sites, boats or RV's. The Ceradyn comes with three ceramic filter elements (it uses all 3) which will treat up to an incredible 150, 000 Liters of water