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 ... and 400mm, and that of the glass rods is from 3.5mm to 42mm. Our company, the biggest borosilicate glass factory ... , such as Japan, India, and USA and other countries. Color 3.3 Borosilicate Glass Tube