5Y3GT vacuum tube made by UNITED ELECTRON, with original packaging. - Model: 5Y3GT - Brand: UNITED ELECTRON - Type: Vacuum Tube - Package: With original packaging This vacuum tube was stored by my grandfather. It has been stored in a box, so I believe it is usable. Please assess the condition based on the photos. Since there is no way to test its operation, its functionality is unconfirmed. Please understand this before purchasing. This item is a used product, so please refrain from purchasing if you are sensitive to such matters. Cancellations, returns, and refunds are not accepted for any reason after purchase. Price negotiations are not possible.