Thank you for viewing. Toshiba / Mazda vacuum tube UY57S, one piece. I do not have measuring instruments or a suitable operating environment, so the operation of this item has not been confirmed. This item has been stored for a long time in a cool, dark place and has only deteriorated naturally. This is an old item, so it is offered as-is, and I would appreciate it if you could understand this. Please check the condition in the photos. Everything shown in the photos is included. Thank you.