Seven good used Blue Arcturus tubes. 1-Type 56, 1-Type 57, 1- Type 38A, 3-Type 127 with engraved base, 1-Type 27 (without engraved base). Two 127s have slightly loose bases typical of many of the tube generation. All fully tested on Hickok AN/USM-118B tube tester. Each tube will be packaged in white tube box.