The Sawyer dual-threaded MINI Filter weighs less than 2 oz., fits in the palm of your hand, and features a threaded output for cleaning coupling compatibility. Hollow fiber membrane is rated to 0.1 micron absolute filtration Removes 99.99999% of bacteria such as salmonella, cholera, leptospirosis, and e. Coli, and removes 99. 9999% of protozoa such as giardia and cryptosporidium