This replacement filter for the GravityWorks water filter system is effective down to .2 microns and meets all EPA and NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa, helping treat water in the backcountry for safe drinking. Microfilter lifetime of up to 1,500L, depending on the quality of the water.

WARNING:Can expose you to styrene, which is known to the State of California to cause cancer.