Audio-Technica AT-ART9

This a lightly used Audio-Technica AT-ART9 Dual Moving Coil cartridge.  I am the original owner.  It was bought new on April 3rd 2017 LPGear and was used on my VPI Prime turntable until August 2018.  We bought a new home at that time and has been sitting in storage since then.  I would estimate the cartridge to have approximately 105 hours as I would typically listen for 1-2 hrs a week (70 weeks x 1.5hrs/week).
The cartridge is in excellent condition with all of the paperwork, box and hardware.  I've attempted to capture the pictures as best I can with my camera.  If you have any questions or would like additional details please message me and I will try to get you the answers you are looking for.
Audio-Technica's Description Utilizing the same vibration system, neodymium magnet and permendur yoke as the AT-OC9/III MicroCoil™ cartridge, the AT-ART9 is designed to provide sound reproduction of the highest quality. The cartridge’s special line contact stylus, with a 40 µm × 7 µm curvature radius and a 0.26 mm diameter solid boron cantilever, enables an extremely accurate reading of the record groove and faithful transfer of the signal from the stylus tip to the magnetic coil. The VC mold design ensures stability and rigidity, while the dual moving coil (fashioned from high-performance PCOCC wire) offers excellent stereo separation and improved frequency response for long-lasting performance. The hybrid housing of machined aluminum and hard plastic, along with the machined aluminum base supporting the magnetic circuit and vibration system, reduces unwanted resonance and supports stable playback.
Features

• Premium magnetic core moving coil type cartridge
• Builds on basic magnetic design of the limited-edition AT50ANV and vibration system of the AT-OC9/III
• Special line contact stylus and solid boron cantilever with a 0.26 mm diameter
• Neodymium magnet and permendur yoke significantly increase magnetic energy
• PCOCC used for coils and terminal pins
• Very high-quality magnetic circuit
• VC mold design ensures stability and rigidity, limiting unnecessary coil movement and reducing distortion
• Hybrid body of machined aluminum and hard plastic reduces unnecessary resonance
• Machined aluminum base
• High-separation, wide-response dual moving coil

Specifications
Cartridge & StylusFrequency Response15-50,000 HzChannel Separation30 (dB at 1 kHz)Vertical Tracking Angle23°Vertical Tracking Force1.6-2.0 g (1.8 g standard)Stylus ConstructionNude square shankRecommended Load ImpedanceMin. 100 ohmsCoil Impedance12 ohms (1 kHz)DC Resistance12 ohmsCoil Inductance25 µH (1 kHz)Output Voltage0.5 mV (1 kHz, 5 cm/sec.)Output Channel Balance0.5 dB (1 kHz)
Stylus ShapeSpecial line contactCantilever0.26 mm diameter solid boronStatic Compliance35 x 10-6 cm/dyneDynamic Compliance18 x 10-6 cm/dyne (100 Hz)MountingHalf-inchDimensions17.3 mm (0.68") H × 17.0 mm (0.67") W × 25.6 mm (1.01") DAccessories IncludedNon-magnetic screwdriver; 2 washers; 2 nuts; cartridge installation screws (12 mm × 2, 18 mm × 2); plastic protector; brush; PCOCC lead wire setBody MaterialAluminiumMounting FeatureHalf-inch mountStylus Curvature Radius1.5 x 0.28 milTerminal PinsBrassTypeMagnetic Core Moving CoilWeight8.5 g (0.30 oz)NotesNote: moving coil cartridges require receivers or preamps with compatible inputs; their stylus assemblies are not field-replaceable.