http://crghlabr45r5pqkgnbgehywk5nxutdks5iss7tabyux5psikqqjirryd.onion/fit/3.html
I think it says what it does on their website, but if it doesn't, and someone wants to see it, I'll upload a photo of the pamphlet on everything that it filters out and how much it does. There are literally hundreds of contaminants on it, with a ~99.5% removal rate for stuff like fluoride and chlorine.