Vacuum tube 12AX7 HITACHI MT9 pin 1 piece This item has been stored for a long time. It was tested and confirmed to be working in a device before being stored. Heater continuity confirmed. The exterior is dirty. The dirt can be wiped off, but in the case of old vacuum tubes, the printing can easily disappear, so I haven't wiped it off. No original box. It will be wrapped in bubble wrap and shipped in a plastic case. #Vacuum tube #MT tube #12AX7 Management number V022