Solenoid nucleus (called also plunger) for Pilot Parker and Lucifer.
This component is located inside the solenoid valve's pilot and fits full size solenoids only. It does not fit smaller solenoids such as the Parker 4,5W.
The seat is made of Viton. Therefore, it is suggested to be installed on 2-way valves but not 3-way grouphead valves.
NOTE that this nucleus does NOT fit Asco brand solenoids (i.e. newer Rancilio espresso machines) or ODE (i.e. Marzocco).
