... precious platings with supper corrosion resistance and shining permanently(cooper 7-8um, Ni 4-8um,cr: 0.25um) 3,faucet corrosion test ... for Stream or Spray 6,faucet working Pressure:above 10kgs 7,faucet working Temperature:0-100 centigrate 8,faucet weight:5 ... cartridge ensure smooth run and no leakage Plating layer: cooper 7-8um, Ni 4-8um,cr: 0.25um Noise level:19 db ...