It is a black adjustment knob with a ribbed surface and a golden ESD symbol. The knob is round on top and has a metal thread at the bottom.

Product Family

ESD knurled knobs

ESD knurled knobs for the safe retrofitting of non-dissipative mushroom knobs in ESD zones (EPA). Replacing non-dissipative knurled knobs ensures a controlled discharge of electrostatic charge. This replacement minimizes the risk of damage to sensitive electronic components.