These are for adjusting those little current setting potentiometers on stepper drivers. The non-conducting tip means that accidentally poking other components, pins, or traces won't damage or interfere with the stepper driver.
€4,09 Excl. btw
Fibreglass sleeving is used in the new E3D v6 HotEnds for easy, neat, and super high temperature insulation of thermistor legs and wiring.
€0,41 Excl. btw