1）*-stage:*0 inch 5 upp cotton
Can effectively filter out water rust, sand and other particles larger solid impurities.
2）*-stage:*0 inch particle carbon
Can effective adsorption residual chlorine in water, humus, disinfection by-products, odor, such as color of different substances.
3）*-stage:*0 inch 1 upp cotton
Removing the small particle ,suspension solids and colloid in the water ,and more.
4）*-stage:*5G Membrane
Reverse Osmosis (RO) is a water treatment process that removes contaminants from water by using pressure to force water molecules through a semipermeable membrane. Reverse osmosis is capable of removing up to *9 percent of *5 different contaminants (see partial list below), including lead, fluoride, chlorine, dissolved salts, and more. 
5）*-stage:small T*3 final actived carbon
Improves taste ,odor and appearance of water ,produces great-tasting water.