Six stage reverse osmosis water filtration system with pump, water presssure gauge, solenoid valve and auto flush valve. Cartridge: PPF, GAC, CTO, RO membrane and T33C post carbon, mineral filter cartridge Water tank option: KCTAS-2W(3.2G white), KCTAS-1(3.2G inner rubber balloon can be replaced), KCTAP-1W(4G plastic), KCTAS-2B(3.2G blue), KCTAS-2(2G). Capacity: 50/75/100GPD