Marshall brand potentiometer manufactured for its amplifiers. With great quality, smooth and precise spin, and with the certainty that the measurements are right for your amplifier. A washer and nut are included. 

Used on Marshall® Valvestate I, JCM900, JCM600, JTM30, JTM60, and 6100 Series. Used on models: AS80R, 8040, 8080, 8100, 8200, 8240, 8280, JCM900 Models: 2100, 2101, 2500, 2501, 4100, 4500, 4101, 4102, 4501, SL-X 2100, SL-X 2500, 6100, 6101, JTM60, and JTM30 Series. They are also used in other Marshall® models.

Measurements:

Total length from base to stem - 30mm

Shaft length - 22mm

Coil shaft length - 7mm

Fluted shaft length for the "Knob" - 12mm

Base diameter - 15mm