Ortofon 2M Cartridges Replacement Stylus, Blue Recommended for following cartridges: 2M Blue / 2M Blue Verso (Upgrade stylus for 2M Red / 2M Red Verso) Frequency response: 20-20,000 Hz + 2 / - 1 dB Stylus type: Nude Elliptical Stylus tip radius: r/R 8/18 m Tracking force range: 1,6-2,0 g (16-20 mN)