Alpha 250k resistor for bass and guitar (choose linear or logarithmic).
Choose 47 uF for bass and 22 uF for guitar.
Our guitar treble bleed kit contains a 0.001 uf capacitor and a 130k resistor. Avoids muddy tone and treble loss when rolling off the volume. Very easy to install (just solder it parallel over the volume pot). Very cheap and effective. For any electric guitar (strat, tele, les paul, ibanez...).