Check the listing for details. RCA Electron Transmitting tube Triode 4x500a. Condition: Open box. Listed at 159.00 USD. RCA Electron Transmitting tube Triode 4x500a Open Box New Condition Please examine the photos as they are part of the description. PURCHASE it with the understanding that you know what you're buying and how to use it. We make every effort to be accurate in our listings. If an Error was made contact us directly. We'll correct it to the best of our ability. We want it to be clear to buyers that all items are SOLD AS PICTURED We do our best to describe each item accurately. We try to provide all known information. We usually provide additional detailed pictures, which provide visual detail of our items. descriptions, showing everything included in the listing. We carefully inspect the item before shipment. In case you found a defect on the purchase, we will exchange or refund it.Contact UsIf you have a question or problem, please contact us first. We ship FAST. in the Continental USA. Please give us time to respond. We are.a business operating in Mountain Time. Weare in during normal business hours.Monday Through Friday