RapidPure Trail Blazer Ultra Light 1.4L Filter is 2.5in and has the Nano Filtration Technology that leapfrogs the competition in drinking water filters. This ultra light system is easy to use and quick to install. This system is perfect to use in rapid response situations. Great flow rate at up to 1.4 liters per minute with gravity flow. Filter will accept water from floods, lakes, rain, well, tap, and river. Filters 1,000's of gallons depending on initial water clarity. While being lightweight, it is also durable, not fragile like ceramic. RapidPure captures viruses that are too small for other filtration systems to capture.