Welcome to our listing and thanks for visiting. After viewing this item, please check our other listings. Here are three type 2A3 radio or electronics tubes. Please view the photographs as we are not experts in tubes. There are three tubes; each one is a type 2A3. One is inside a box. The box and the tube are marked “Sylvania”. The tube is marked “2A3″ on the glass. Each of the other two tubes are marked “RCA”, and marked “2A3″ on the glass. These two tubes do not have boxes. We used a Hickok model 1575 tube tester and we tested the tubes. The Sylvania tube and one of the Rca tubes tested very good. The other Rca tube tested good. Even though the Sylvania tube is in its original box, we are not certain it is an unused tube. We hope that the photos will help those who are interested. We will do our best to answer any questions. Have a nice day. We hope that we have described our items to complete satisfaction. We are not on-line everyday though, so please be patient for the reply. This is to cover costs of boxes and packing material. We do not make any profit from this.