This is a unused IERC tube shield that is still sealed in the original packet. This is part number M24251-6-4 type number TRN6-6015B. Both of these numbers are marked on the tube shield. This is for a 9 pin short tube. This will fit a 12AX7 tube, the last pictures are with a 12AX7 in the shield. The tube is not included, you will receive one NOS tube shield sealed in the original packet.