In operation, I have been able to draw quartz tubing as well as borosilicate glass and to obtain repeatable results with open tips substantially less than one micron outer diameter. I believe that this invention is the first mechanism capable of repeatably drawing quartz tubing. The use of heating elements 61 and 62 of relatively low thermal inertia and both being movable relative to tubing 20 facilitates extremely delicate regulation of the temperatures applied to the tubing 20