The ethereal and precious qualities of glass captured in a continuous extruded profile. It seems amazing that it's possible to harness these high value qualities in a process usually associated with plastics and metals. Simple tube profiles over 400 mm diameter are feasible but complex and intricate profiles can't be made so large. Used in the production of scientific equipment and even building facades, there is a great deal of scope for such materials.
Extruded glass is typically borosilicate, which is also known under the trade names Duran, Simax and Pyrex (although the Pyrex consumer brand no longer uses borosilicate glass in North America). Borosilicate is used primarily for its resistance to high temperatures and thermal shock.
Image from MPFDP