Used 5Y3GT vacuum tube.  Some JAN, some 5Y3WGT, some 5Y3WGTA.   Made in USA.  All test good on Hickok 534 tube tester.  Brands include RCA, Sylvania, CBS, National-Union, Thomas, Wards-Airline, GM-Delco, etc.  If you want a specific brand or type, let me know.  Price is per tube.

Shipping can be combined with other tubes, sockets, and parts for sale in my ebay store, $0.50 for each additional miniature, $1 for each octal.  Add to cart then request invoice.
Used tubes may ship in a box marked with a different brand or type.

International shipping can be expensive, it starts at over $50 for many countries.