4 RCA 12Z3 Vacuum Tubes NOS NIB Lot Of Four Shoulder ST Style likely Tung-Sol-MANUFACTURED) measured 31 while

likely Tung-Sol-MANUFACTURED) measured 31 while Tube Two (no silkscreening 6AK5-LABELED

Tube One: 20

From the very bottom to the very top of this rheostat

64 and 68 where minimum (65%) is 46

There were no shorts or gas and both measured 33 where minimum (65%) is 25

4 RCA 12Z3 Vacuum Tubes NOS NIB Lot Of Four Shoulder ST Style likely Tung-Sol-MANUFACTURED) measured 31 whileThese four new old stock, new in box RCA 12Z3 tubes tested to spec on our Paul Hart calibrated TV7 U. One is milspec and one is a Cunningham. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY