Very little use on this incredible cartridge. One of the finest cartridges ever made (I suspect if youre reading this you already know all about this powerhouse of vintage Moving Magnet carts). I was sold this cartridge a few years back with low hours and Ive put maybe 50 more hours on it since. The tracking ability is unmatched by any cartridge in my collection, its truly incredible. Sound quality is flawless as well. This particular cartridge is known for being ultra faithful to the sound of the original analog tape, preferred and used by mastering engineers and audio reviewers in the golden age of ultra high tech cartridges with exotic cantilevers. Some of the unique features of the ML-170: Anti-resonance Ceramic base, Gold-plated Boron Pipe cantilever, MicroLine stylus with extremely low stylus tip moving mass for extended frequency response and super accurate reproduction. Low tracking force for minimum record wear and longest possible stylus lifespan. SPECIFICATIONS AT-ML170 / LC-OFC: ------------------------- ? Frequency Response (Hz): 5 - 40,000 ? Vertical Tracking Force: 1.25 +/- 0.3 ? Tracking Ability (microns) at center value VTF: 90 ? Tracking Ability (microns) at upper value VTF: 100 ? Channel Separation (dB at 1kHz/10kHz): 31/21 ? Channel Balance (dB): 0.5 ? Output (mV at 1kHz), 5 cm/sec): 4 ? Vertical Tracking Angle: 20 degree ? Stylus Shape: 0.1mm MicroLine ? Stylus Construction: Nude Square Shank ? Cantilever: Gold-plated BORON PIPE ? Wire Used For Coil: LC-OFC ? Recommended Load Impedance (ohms): 47,000 ? Recommended Load Capacitance (pF): 100 - 200 ? Dynamic Compliance @ 100Hz: 10.0 (*Dynamic Compliance @10Hz will be around 18-20cu) ? Static Compliance: 40.0 ? Cartridge Weight (grams) 7.0 Cartridge will come protected in bubble wrap and stylus will be in its own jewel box, immobilized by foam (zero contact on cantilever/diamond tip of course), and wrapped in bubble wrap. The entire shipment will be double boxed. Ships free USPS Priority in the continental US!