... one 3, CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case is made ... to be used, flexible, and can be sterilized in a variety of target sites and many other advantages ... , long-life design4 air-source and oxygen source one machine, the customer can use on demand Useful: 1, ... made you the 40g, 50g,100g ozone machine, the machines are customized! Welcome your inquiries!