Vacuum Tube (Constant Voltage Discharge Tube) VR150-MT (0A2) NEC (Nippon Electric) MT7 pin 2 tubes This is a special vacuum tube that discharges at a constant voltage of 150V. Maximum permissible current: 30mA These are items that have been stored for a long time. They were removed from working equipment and stored as is. There is no heater, so there is no need to worry about a heater burnout. There is some dirt on the exterior. Since they are made of glass, the dirt can be wiped off, but in the case of old vacuum tubes, the printing can easily come off, so I have refrained from wiping them. There is no original box. They will be wrapped in bubble wrap and shipped in a plastic case. #VacuumTube #MTtube #VR150-MT Management numbers V032, V033