Marshall brand potentiometer manufactured by Alpha for their amps. With great quality, smooth, precise twist and with the certainty that the measurements are right for your amp. A washer and nut are included.

Measurements:

Total length from base to stem - 32mm

Shaft length - 22mm

Threaded shaft length - 12mm

Fluted shaft length for the "Knob" - 10mm

Base diameter - 24mm