... company is ZIBO RUICHEN Special Glass Limited Company, The main production is are borosilicate glass tubing & rod, the OD of article ... . We can produce 16500 metric ton in every year. The production is exported in many countries, such as Japan, India, and ... 300mm-400mm successfully, which complement some blanks in technology. special size of high Borosilicate Glass 3.3 Triangle rods