They are 4 stages.Stage 1: Sediment filter removes suspended impurities from inlet water. Stage 2: Metallic ion exchange filterThis patented high precision ion exchange can effectively remove chlorine and heavy metals as lead, mercury, arsenic,cadmium, zinc, manganese, selenium, iron, chromium, aluminum, nickel and copper, as well as to suppress thegrowth of bacteria and algae. Stage 3: Activated block carbon cartridge removes organic chemicals, agricultural chemicals, insecticides, bleaching agent, phenols, trihalomethanes and other carcinogenic substances as well as odor, foreign color and residual chlorine.Stage 4: The 0.02um hollow fiber filter can effectively remove dirt, rust, bacteria (colibacillus vibrio cholerae,dysentery bacillus, salmonella, etc.), parasites and microbes up to 99%.(water purifier,UF water purifier,reverse osmosis)

                  2011 new products--Tiger quick fitting

             New models coming soon!

natural activation(water purifier)