Ortofon Stylus 7

Ortofon 7 Stylus Technical Data
Frequency range 20-20.000 Hz
Frequency response 20-18.000 Hz + 2dB
Tracking ability at 315Hz at recommended tracking force 60 µm
Compliance, dynamic, lateral 25 µm/mN
Stylus type Elliptical
Stylus tip radius r/R 8/18 µm
Equivalent stylus tip mass 0,5 mg
Tracking force range 1,0-1,5 g (10-15 mN)
Tracking force, recommended 1,25 g (12,5 mN)
Tracking angle 20°
Stylus colour Black

Recommended for following cartridges TM 7U Ortofon OM Stylus History Chart Below is a chart that denotes which styli were sold with which cartridges, past and present. However, keep in mind that all these styli are interchangeable.
For expamle, if you have an old Ortofon TM 7U cartridge, you can order a 20 or 30 stylus if you're interested in upgrading. There are differences in the respective anatomies of these cartridges, but upgrading the stylus will yield better results regardless.