This Siemens EF86 6267 audio pentode tube is a rare find for vintage audio enthusiasts. It is brand new old stock (NOS) and comes in its original package (NIB). Designed and manufactured in Germany, this tube is highly sought after for its low noise operation and excellent sound quality. It is the perfect addition to any vintage audio setup and is guaranteed to enhance the listening experience. Suitable for use in amplifiers, preamps, and other audio equipment, this EF86 tube is a must-have for any serious audiophile.