Changsha city Okay Energy Equipment Co.,Ltd which is the first oxy-hydrogen generator in China,we have researched and produced hho generator or more than 12years.Main products:Oxy-hydrogen Generator,HHO Generator,Carbon Cleaning System,Catalytic Converter Cleaning Machine,HHO welding Machine, Oxy Hydrogen Flame Polishing Machine.All products are authorized CE ISO and TUV certificate and any own patents successfully.Now we have developed bigger business scale and the distributors from India,Mexico to join us.Welcome to come to Changsha,Hunan to visit our company or inquiry us anytime.