This listing offers two NOS tubes, model 117Z3, from both GE and Sheldon. These vintage radio tubes are perfect for collectors and enthusiasts looking to maintain the authenticity and quality of their vintage electronics. Both the GE and Sheldon brands are well-known for their high-quality tubes and these 117Z3 models are no exception. With this listing, you will receive two tubes to add to your collection or to use in your vintage audio or video equipment. Don't miss out on the opportunity to own these rare and sought-after tubes.