... cost & better effect 40g/h Ozone water sterilization machine with water cooling Feature:1 Outer case is made of the corrosion resisting ... design4 air-source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory: materials, oxidation, ... hospital wards, operating theaters, medical equipment, sterile room Also we can made you the 20g, 50g,100g ozone machine, the machines ...