... reach CUPC ,NSF,AB1953 standard 4,All of our faucet come with 5 year warranty Faucet feature:1,surface finish of faucet ... of plating rayer reachs to 12um.Multi-rayer precious platings with supper corrosion resistance and shining permanently. 3,faucet corrosion test ... :NSS/ASS 24hours/48hours,corrosion status comply with GB18145-2003 and international standards. 4,function of faucet: ...