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