This new cartridge is a complete redesign, with a four piece OTL cantilever (compared to the Black and Green which have a three piece variation), oxygen free wire in the coils and Grado's specially designed elliptical diamond stylus mounted on a brass bushing. Frequency Response: 10-50. Principal: MI. Channel Separation at 1KHz: 30. Input Load: 47K. Output at 1KHz 5CM/sec.: 5mV. Recommended Tracking Force: 1.5. Stylus Type: Elliptical. Inductance: 45mH. Resistance: 475. Compliance CUs: 20. Stylus Replacement: User replaceable. Mounting: Standard. Weight: 5.5g