Thank you for viewing my listing. This is a set of 23 ST tubes, GT tubes, and metal tubes. Some of the model numbers are missing. I received these as working items, but I have not been able to confirm their operation. Please understand that these are sold as junk items. I have packed as many as possible into a Yu-Packet Plus box. To prevent damage, I have protected them with air caps and packed them so they won't move around in the box during transport. Due to the thickness, shipping will be via Yu-Packet Plus. - Type: ST tubes, GT tubes - Quantity: 12 - Condition: Used - Remarks: OC3 (RCA) 5V4-G (RCA) CHY-OD3 (HYTRON) Above, made in U.S.A. UZ-57A (Mazda) 12GB3 (Toshiba) 5GK18 (Toshiba) Probably UY-57 (NEC) Above, made in Japan Other 5 tubes - Type: Metal tubes - Quantity: 11 - Remarks: RCA, Ken-Rad, Nippon Electric, Mazda, etc. 6sa7, 6ac7w, 12sr7 (vt-133), 12sa7, 6j5 (vt-94), 6sj7, 6j7, vt-66 That's all. Thank you for reading to the end.