Color 3.3 Borosilicate Glass tube 1)OD:8mm-315mm 2)WT:1mm-9mm 3)Color:black,white,blue,red,pink,purple,yellow... Our company ... that of the glass rods is from 3.5mm to 42mm. Our company, the biggest borosilicate glass factory in Zibo, has been regarded as a high ... , such as Japan, India, and USA and other countries. Color 3.3 Borosilicate Glass Tube