MSR MiniWorks® EX Purifier System Description:The MiniWorks® EX Purifier System combines the best-selling MiniWorks® Microfilter with Aquatabs® purification tablets for comprehensive protection. This system filters out bacteria, protozoa, and particulate using a ceramic/carbon element, and adds viral protection with chlorine-based tablets, making it ideal for backpacking and international travel. It meets U.S. EPA requirements for microbiological water purifiers. Description Effective Against: Viruses, bacteria, protozoa, and particulate. Fast & Easy: Filters up to 1 liter per minute without the need for chemicals, bulbs, batteries, or waiting. Self-Cleaning: Ceramic/carbon filter can be cleaned repeatedly for full flow recovery. Long-Lasting: Filter treats up to 2,000 liters, while each Aquatabs® tablet treats up to 2 quarts of water. Durable: Engineered to withstand heavy use and harsh environments. Tech Specs SKU: 56431 Weight: 1 lb (0.46 kg) Width: 2.75 in (7 cm) Length: 7.5 in Height: 5.5 in Effective against bacteria: Yes Effective against chemicals/toxins: Yes Effective against particulate: Yes Effective against protozoa: Yes Effective against viruses: Yes Filter media: Ceramic Plus Carbon Filter pore size: 0.2 microns Flow rate: 1 liter per minute Flow rate (strokes per liter): 85 Field cleanable: Yes Field maintainable: Yes Water Bottle Adapter: Yes Material: Ceramic Country of Origin: Made in the U.S.A. of U.S. and Imported Materials