MSR Guardian Gravity Purifier

Weight 1 lb 3 oz / 0.53 kg Width 4 in / 10 cm Length 12 in / 30 cm Height 4 in / 10 cm Effective against bacteria Yes Effective against chemicals/toxins No Effective against particulate Yes Effective against protozoa Yes Effective against viruses Yes Filter media Advanced Hollow Fiber Filter pore size 0.02 microns Flow 0.5 liters per min Cartridge life 3,000+ liters Field cleanable Yes Field maintainable Yes Water Bottle Adapter Yes Cartridge replacement indicator Yes Materials UF Hollow Fiber, ABS Country of Origin Made in the U.S.A. of U.S. and Imported Materials