1,Material:stainless steel 2,Auto descalling when 1 mm 3,PH value adjustable from 5 to 7 4,Long service life This product is designed , researched and developed ,produced by our own company , and obtain National Patent ,patent NO.: 98250961Product features1,Environment protectionEnergy saving , high effect, non-pollution2,Long operating life automatic descaling when water scale reach 1mm thick, ...