Matched Quad (4) General Electric GE 8417 Vacuum Tube High Power Output Tube 3 in original box and 1 is in a generic box. Tubes have been tested on a B&K Dyna-jet model 747 tube tester. One pair (2) test at 78 and one pair (2) test at 85 with 60 beeing the minimum good. Although tested, due to the age and the risk of damage due to misuse all vacuum tubes are sold as-is, no returns or refunds.