MSR Miniworks EX waterfilter with two filter cartridges and repair kit. The entire filter costs $120 new, replacement filters are $58, and the maintenance kits is $32. Please see photos of filter cartridges with the measuring gauge that determines if they are worn out. You'll see that the older filter cartridge still has just a little bit of life left in it, the newer filter cartridge has only been used and cleaned a few times, and has plenty of use left in it. I have had this filter for about ten years and it has always worked great. I have replaced the O-rings and other parts previously, and it currently still works. The repair kit enables you to fix it if any parts become worn, and you can maintain it in the field. I am only selling it because I bought their newer Gaurdian Purifier and no longer need this.

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