500k push/push tone potentiometer with flex ribbon for Ernie Ball Music Man Jason Richardson, Majesty v2 & JP15 v2 preamps. Note: Majesty v2 preamps have the mono/stereo mode switch as a button in the back control cavity. The JP15 potentiometers will need to be visually checked to determine, if the pots have the flex ribbon, it's a JP15 v2 preamp.