Our most versatile and comprehensive water treatment system. Get the added viral protection that&';s critical in popular wilderness areas and developing countries with this comprehensive purifier and microfilter system. The MiniWorksA(R) Microfilter-our best-selling filter for demanding conditions-utilizes a ceramic/carbon element to filter out waterborne bacteria and protozoa, as well as particulate, taste and odors at 1 liter per minute. When viruses are a concern, the chlorine-based AquatabsA(R) purification tablets add viral defense. Together they provide the most reliable water possible in a compact, lightweight system that&';s great for backpacking and international travel. Effective Against: Viruses (99.99%), bacteria (99.9999%), protozoa (99.9%) and particulate. Meets U.S. EPA drinking water standards* and NSF protocol P231 testing standard. Iodine-Free: Aquatabs tablets inactivate viruses without bad-tasting iodine. Includes 50 individually packaged tablets. Each tablet treats up to 2 quarts of water depending on conditions. Reliable: Filter&';s durable ceramic/carbon element ensures safe, taste-free water-even with frequent, heavy use. Field-maintainable: Filter can be cleaned repeatedly for full flow recovery with no tools required. *U.S. EPA Guide Standard and Protocol for Testing Microbiological Purifiers This system meets U.S. EPA requirements for microbiological water purifiers. Weight (Standard): 1 lb Width, Length, Height (Standard): 2.75 in, 7.5 in, 5.5 in Filter media: Ceramic Plus Carbon Filter pore size (microns): 0.2 Flow (L/min): 1 liters per min Flow (strokes per liter): 85 Field cleanable: Yes Field maintainable: Yes Water Bottle Adapter: Yes Material(s): Ceramic Country of Origin: Made in the U.S.A. of U.S. and Imported Materials