JJ ECC802S vacuum tube pair set. This is a proxy listing for a family member, so responses to technical questions may be delayed. According to the owner, they were purchased as a pair. They are not new and unused. It is believed they were not used for a very long time, but the duration and frequency of use are unknown. The box has some writing on it and is not in good condition. Please check the photos for the product condition. Shipping is planned via Yu-Pack Plus or Takkyubin Compact. Since this is an amateur inspection, there may be oversights such as unnoticed dirt. To prevent any trouble, returns, refunds, or exchanges are not accepted. Please consider purchasing only if you understand that these are used items.