Our company JINAN GT INDUSTRICAL CO.,LTD is the lead manufacturer of the borosilicate glass, Our products include borosilicate glass tube and rod include clear, colour, profile, heavy wall, borosilicate glass sheet thickness from 2mm to 8mm and the biggest size is 600*1200mm, any type glass cylinder and some glassware made from borosilicate glass, if you are interested our products pls contact with me.