Undersink reverse osmosis: 1.Standard 5 stage RO system 2.Food grade material Water resource ... AC 220V/50HzRated power:30WUtilization of water:30%RO 5 stage systemFilter PP, GAC, CTO 50G CSM membrane 3.0G pressure ... 435 sets40'GP:910 sets40'HQ:1013 sets Stage 1:(PP)5 micron sediment filter,it's effective removing dirt, rust ... ,it remove:lead,cooper,barium,mercury, sodium.Stage 5:T-33 post carbon filter