MSR MiniWorks EX Microfilter - Water Purifier The MiniWorks® EX microfilter is the worldwide best-selling microfilter, delivering long-lasting, field-maintainable water filtration in demanding environments. Engineered for frequent and heavy use, it utilizes our workhorse Marathon™ EX carbon/ceramic element to ensure clean, reliable and taste-free water. Thanks to its innovative AirSpring Accumulator™, it’s capable of pumping one liter per minute and the flow rate can be renewed easily and repeatedly in the field—no tools required. It’s lightweight and compact and, most importantly, been proven reliable by thousands of adventurers just like you. Features: Testing: Meets NSF protocol P231 for removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. Reliable: Durable carbon/ceramic element ensures safe, taste-free water—even with frequent, heavy use. Field-maintainable: Can be cleaned repeatedly for full filter recovery with no tools required. Fast Flow: AirSpring Accumulator™ increases filtration speed; up to 1-liter per minute. Better-tasting Water: Carbon core removes unpleasant tastes and odors caused by organic compounds, such as iodine, chlorine, and pesticides. Watch this short video to find out more about the features and benefits of the MiniWorks EX Microfilter​: Technical Specifications: Weight: 1 lb / 0.46 kg Width: 2.75 in / 7 cm Length: 7.5 in / 19 cm Height: 5.5 in / 13.97cm Effective against bacteria: Yes Effective against chemicals/toxins: Yes Effective against particulate: Yes Effective against protozoa: Yes Effective against viruses: No Filter media: Ceramic Plus Carbon Filter pore size (microns): 0.2 Flow (L/min): 1 liters per min Flow (strokes per liter): 85 Cartridge life: ~2000 liters Field cleanable: Yes Field maintainable: Yes Water Bottle Adapter: Yes Cartridge replacement indicator: Yes Material(s): Ceramic Mechanical advantage: Yes