http://www.eastchemy.com/ After Sales Service a. After the delivery of our company's products, we will send special personnel to track the cargo transportation and ensure the delivery time. b. Free technical support for the products sold. c. Our company is equipped with a high-quality after-sales service team with technicians as the mainstay. Receive user service information or feedback and other issues, and make a satisfactory response and processing for the user in a short time. d. After the goods arrive, they will be returned and replaced due to the quality problems of our company. e. Our company set up a complaint phone () If we are not satisfied with the service quality of our company's product quality after-sales service personnel, we can make a complaint. Our company will handle it seriously. f. Our company regularly contacts customers to know the use of products, help solving various problems that may be encountered during use, solicit opinions, in order to serve customers better.China Coupling Agent manufacturers website:http://www.eastchemy.com/ website2:http://www.eastchemy-ru.com/