Set of four (4X) Bourns 500K Long split shaft audio taper potentiometers.   Low Friction Rotation  Bourns are a nice quality alternative to CTS pots.  These audio taper pots are suitable for both tone and volume controls.  Some of the features of this pot are: 500K Ohms/15% Tolerance Audio Taper Standard rotation Solid brass 3/4" (long shaft) bushing Split, coarse 18-tooth, knurl, 6mm diameter shaft - Uses metric push on knob Each pot comes with hardware - 2 nuts & dress washer Requires 3/8" diameter mounting hole Note:1.  If you are uncertain whether your guitar uses short (3/8") or long (3/4") shaft  pots, as a general rule this pot will fit most USA-made Gibson Les Paul's manufactured after 1977 (those with a control plate), Les Paul Studios, and excluding historic reissues, but  please double check before you order. 2. Make sure to pinch the tip of the shaft before you try fitting a knob, this will avoid getting knobs stuck before you install the pot.  If you've ever had that happen...