1.CE ISO 2.cross flowrate 3.4w-220w,OEM service 4.304# stainless 5.operation time counted automatic Details: 1.UV sterilizers use the 304# stainless steel inside and outside. 2.The main internal and external are polished to enhance the UV irradiance Assembling with the high purity quartz tube, matching with the appropriation uv lamp tube for water treatment, sterilization strong, long time, ...