This Mullard 10m Electron Tube Master Series ECH816AJ8 is a Vintage item that has not been tested. It is a great addition to your Vintage Audio & Video collection. The tube is specific to Brand Mullard and Type ECH816AJ8. It is perfect for those who are looking for Vintage Parts & Accessories or Vintage Tubes & Tube Sockets. This item is sold as is and does not come with any guarantee or warranty.