Sterilization must adopt distilled water as operation medium.Even purified water has various minerals and can produce furring scale after evaporation at high temperature,which after a period of time,can to leaking of steam due to improper closure.It can also lead to the narrow pipes sensor,to the malfunction of temperature sensor and to other failures.Once the furring scale enters handpiece and other instrument which are hollow inside or has apertures,it will clog the narrow pipes and axis,lowering the turning speed of handpiece,thus reducing its life span.Therefore Specification Voltage:220V/50Hz Power:300W Distilled water:1.5L/h Chamber size:?8X20 Outside size:290X290X390mm Weight:3.5Kg packing size:245X285X510mm