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

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

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

New In Box Radio Tube 6GU7 .

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

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

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