Top quality Moving Magnet Cartridge with Diamond stylus Excellent soundstage - superb sound Yamaha P-450, P-500, P-520, P-550, P-750 Free mounting bolts are included Please contact us if you need fitting advice Excellent sound quality Type: Moving magnetic cartridge with diamond stylus needle Easy to install; Excellent sound quality and strong tracking ability; Output voltage (at 1k Hz, 5 cm/sec): 5.5 mV +- 3dB; Channel balance (at 1kHz): below 1 dB; Channel separation (at 1kHz): more than 15 dB; Frequency response: 20 ~ 20k Hz; Tracking force: 3.0g (2.5 ~ 3.5g); Stylus Tip: stereo spherical diamond tip 14 day "any reason" return plus a 6 months warranty