*****SELLING WORLDWIDE******NOS PLATINUM MATCHED PAIR triode-triode & tube-tube in transconductance & plate current)>>>> PAIR SYLVANIA 6SN7GTB,NOS,SHORT BOTTLE,YELLOW Label.”STOCK PHOTO”.97-99%% Label Visible,US MADE.Tubes will be supplied in new Sylvania box.BLACK T-PLATES,WE HAVE ENOUGH TO GIVE A PLATINUM MATCHED TUBES,CLEAN OCTAL PINS,TIGHT BASE.**** TWICE TESTED. *****1st)NO SHORTS,NO GAS AND WELL-BALANCED TRIODES IN TRANSCONDUCTANCE AND PLATE CURRENT(PLATINUM MATCHED) USING HICKOK TUBE TESTER *****2nd)TUBES ARE NOT USABLE UNLESS THEY ARE LIVE AUDIO TESTED WITH NO HUM & NON-MICROPHONIC,TESTED USING MODIFIED DYNACO PAS 3 & TUBE OTL. Having a minimum of, TUBE1) 92/94 & 10.0/10.2 ma TUBE2) 92/96 & 9.9/10.2 ma uSIEMENS /PLATE CURRENT Where 50/50 is minimum,which is 65% of NOS & NOS/100% start at 77/77 with newly calibrated TV7 TUBE TESTER. *****TUBES WITHOUT TEST DATA IS NOT WISE DECISION AND LISTING ADS THAT SAY’S “test good”OR “test strong” WITH HIDDEN TEST RESULTS IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES.****BEWARE OF SOME CLONED/FAKE SYLVANIA 6SN7’S. *****WE DO COMBINE SHIPPING ****** MY WORLDWIDE SHIPPING IS ACTUAL USPS REGISTERED MAIL. ******PLEASE CHECK MY OTHER COOL AUDIO STUFF.. *****QUESTIONS ARE ALWAYS WELCOME.