SHOWER WATER FILTER – Maximum 15-stage filtration capacity: featuring a scientifically formulated process of 12 different filtration media in 15 stages, shower filters quickly remove up to 99% of chlorine, sediment, hydrogen sulfide, and water-soluble heavy metals.  Water quality is further improved by nurturing elements of scalar energy which is shown to re structure water. Fits on most standard showers, lasts approximately 6-12 months before cartridge needs replacing. Comes with an extra cartridge.