OBT is a professional manufacturer, supplier of colloidal-silica-1kg, we provide colloidal-silica-1kg OEM & ODM wholesale, colloidal-silica-1kg price and more questions, please contact us and follow our Facebook , We will respond in a timely manner, we are not the lowest price of colloidal-silica-1kg, but we will provide you with better service.
Sign up for our newsletter and follow us on social media
OBT Mining as the China No.1 biggest manufacturer for mullite sand which has been supplying to Germany Thyssenkrupp,totally capacity 200000tons and OBT casting subsidiary factory specializing in R&D and manufacturing of precision casting equipment, precision metal products processing and precision casting process. Comprehensive company for technical research and supply for the invesment casting sand and machines. ...