Sawyer Products SP191 Point Zero Two Bucket Purifier Assembly Kit with Faucet Adapter N/A Made in USA 0.02 Micron absolute hollow fiber membrane purifier Removes 99.997% of viruses, 99.99999% of bacteria, and 99.9999% of Protozoa/Cysts Housing material made from food grade ABS plastic is easily to field maintainable Filter output is 1-liter per minute with gravity, and with faucet water full facet pressure Backed by a manufacturer's limited lifetime warranty