... 4. No rust in shell welded line uv water sterilizer, uv sterilizer for drinking water, water sterilizerFeaturesPremium ... no rust even in welded lineCE & RoHS certifiedTransformers:10W 110 / 60, 120 / 60, 220 / 50 230 / ... 50 250 / 506W 110 / 60, 120 / 60, 220 / 50 230 / 50 ... SS304 material for shellEasy replacement design for UV lampChamber inner surface specially polished, no RUST ...