Four 6AL5 tubes. The manufacturer is Toshiba, and they are unopened with the original box. Both the top and bottom have an outer lid with tabs, and inside, a pair of inner lids on the left and right are glued in place, indicating that the vacuum tubes have not been removed. Also, the original box has no age-related damage, which also supports the conclusion that they are unopened. Will ship via Nekopos. # 5726