We are also focusing on improving the stuff management and QC system so that we could keep great advantage in the fiercely-competitive business for Science Equipment, Total Residual Chlorine , Total Chlorine , Copper Zinc Test ,Alkalinity In Water Pool . If you are interested in our products, please feel free to send us your inquiry. We sincerely hope to establish win-win business relationships with you. The product will supply to all over the world, such as Europe, America, Australia,London, Porto,belarus, Colombia.Our company always concentrate on the development of the international market. We have a lot of customers in Russia , European countries, the USA, the Middle East countries and Africa countries. We always follow that quality is foundation while service is guarantee to meet all customers.