we are suppling highly concentration ozone water machine. (the concentration of ozone water is 4-7ppm), and ozone gas mass percentage is 18-20%; we adopted Electrolysis to produce highly concentration ozone water/ozone gas. which is quite different with the traditional technology(Corona Discharge/UV); At present, we are willing to promote business in the world, and looking for the best agent or importer. please contact us if you are interested in them. Thanks & regards, Richard Xu