You have just made contact with on of ebay's best tube selling company's! We are Clean Audio Sound and if you have any questions please just go to the contact member and send us a message! We are a worldwide provider of Old Stock vacuum tubes, amplifiers, preamps, tuners, radios, parts, and records. All of the units and tubes we provide pre date 1970 and are considered old stock equipment. Some of the tubes we provide are and not limited too the 12AX7, 6K6, 6BQ5, 7189, 7868, 5654, 12AU7, 6L6, 6CA7, 7247, 6DJ8, 5Y3, 6V6, 6SN7, 6SL7, KT88,and many more. Most of the time you can find Mullard, Telefunken, Amperex, and Seimens.