The WaterWorks EX offers greater protection than any other filter in the line. Long-lasting and fully field-maintainable, it features a durable ceramic element that delivers years of protection, as well as a second-stage PES membrane for extra filtering power. The WaterWorks can be cleaned repeatedly for full recovery, with no tools required for complete disassembly. And, thanks to its innovative AirSpring Accumulator,it is capable of pumping one liter of water per minute. * Added Filtration: Second-stage PES membrane delivers extra filtering power. * Field-maintainable: Can be cleaned repeatedly for full filter recovery; no tools required for complete disassembly. * Fast Flow: AirSpring Accumulator increases filtration speed; up to 1 liter/minute. * Long-lasting: Durable ceramic element ensures protection and will pump water for years. * Effective Protection: Removes bacteria, protozoa (including crypto and giardia), and particulate. * Better-tasting Water: Carbon core removes unpleasant tastes and odors caused by chemicals, such as iodine, chlorine, and pesticides. Weight: 19 oz./540 g Dimensions: 8 x 3.75 in./20 x 10 cm Cartridge Life: Up to 2,000 liters, depending on water conditions. Includes: Stuff sack, hose float, scrub pad, and instructions.