shows the pipette puller shown generally as 10 for drawing glass or quartz tubing 20 into micropipettes, microelectrodes or microneedles in which the tip will be open and typically less than one micron in outer diameter. Two micropipettes are formed from tube 20 (Fig. 2). As used herein the term "micropipette" includes microelectrodes and microneedles with tips of ten microns or less outer diameter