Matched Pair RCA 6X4/EZ90 Black Plate O-Getter Rectifier Vacuum Tube. One tube is slightly taller. Fully tested by calibrated Hickok 539C tube tester with no shorts, leakage or gas. Measurement: 88/90 82/88 where minimum good value is 54 |
Strong and tightly matched pair! I will gladly combine shipping upon request. |
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