2M Series styli interchangeability :
The 2M Series' engines, coils and magnets configurations are not identical: Red and Blue are identical, so are the Bronze and Black and so are the true mono variants 2M Mono and 2M 78. Likewise, 2M series styli are interchangeable within the below.

Specifications :

Output voltage at 1000 Hz, 5cm/sec. - 4 mV
Frequency range at - 3dB  - 20-22.000 Hz
Frequency response  -  20-20.000 Hz + 3 / - 1 dB
Tracking ability at 315Hz at recommended tracking force - 70 µm
Compliance, dynamic, lateral  -  18 µm/mN
Stylus type  -  Nude Spherical
Stylus tip radius - R18 µm
Tracking force range  - 1.6-2.0 g (16-20 mN)
Tracking force, recommended -  1.8 g (18 mN)
Tracking angle  -  20°
Internal impedance, DC resistance  - 700 Ohm
Internal inductance  -  350 mH
Recommended load resistance  - 47 kOhm
Recommended load capacitance  - 150-300 pF
Cartridge colour, body/stylus - Black/White
Cartridge weight without screws  - 7.2 g
2M PnP MkII cartridge with integrated headshell weight  -  20 g
2M PnP MkII cartridge with integrated headshell length - 52 mm