Doepfer - Mod Wheel kit (single)
Modulation Wheel kit - single Wheel
This set of parts consists of a special potentiometer (10k lin) with nut and washer, the actual modulation wheel made of black plastic, the mounting bracket, a rubber buffer (so that the wheel hits the bracket softly), and a return spring with an associated lock washer. The return spring can either be mounted (e.g. for pitch bend) or not (e.g. for modulation, volume etc.).
The whole unit is only available as a parts set. The assembly must be carried out by the customer himself.