1,20g ozone machine mainly use for hotel, factory,medical industry and so on ... CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case is made ... of mobile disinfection3 ozone quartz glass tube cavity for the removal of ozone at high concentrations, a ... -source and oxygen source one machine, the customer can use on demand Useful: 1, the laboratory: materials, oxidation ...