Physically 2M styli will fit on alternative 2M cartridges bodies, but 2M Series cartridges’ engines, coils and magnets configurations are not quite identical: Red and Blue are identical, so are the Bronze and Black and so are the true mono variants 2M Mono and 2M 78.
Compliance, dynamic, lateral - 20 µm/mN
Stylus type - Elliptical
Stylus tip radius - r/R 8/18 µm
Equivalent stylus tip mass - 0.5 mg
Tracking force range - 1.6-2.0 g (16-20 mN)
Tracking force, recommended - 1.8 g (18 mN)
Tracking angle - 20°
*) Typical value
Stylus colour - Red
Recommended for following cartridges - 2M Red, interchangeable with 2M Blue.