Matched Pair RCA 6GU7 Tubes 0 % Leakage, Conductance Tested at 117% / 109%

4 Matched RCA 6GU7 Tubes 0 % Leakage, Conductance Tested at 140%

RCA 6GU7 Electron Tube Vacuum Tube Valve in Original RCA Box, Model/MPN 6GU7

(1) NOS RCA 6GU7 Vintage Radio Audio VACUUM TUBE

3 Matched RCA 6GU7 Tubes 0 % Leakage, Conductance Tested at 130%

RCA 6GU7 Vacuum Tube ~ Radio Tube in Box, Tested

6GU7 RCA NOS Vacuum Tube, B&K 747B Tested - will combine shipping

Vintage NOS/NIB RCA 6GU7 Tube