Headshell, Cartridge and Stylus for straight tonearms Black plug in style Moving Magnet standard cartridge Fits: JVC L-A100, L-A120, L-A21, L-A31 Please study the picture carefully. This headshell is for straight tonearms only (not linear) it is not suitable for "S" shaped tonearms. It is secured by a top screw If you have any doubt then contact us, we are always happy to help. Top Quality MM cartridge and stylus Plugs straight in! Type: Moving magnetic cartridge with diamond stylus needle Model: complete unit assembled in the UK 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