*****SELLING WORLDWIDE***** >>>> PAIR TUNGSOL 12BZ7 Platinum Matched Pair.BEST DIRECT PLUGIN SUB FOR 12AX7.Matched within 7% or less triode-triode & tube-tube.NOS,TUBES & BOXES are Stock Photos.Supplied in Original Tungsol box.50-77% print visible.I Make sure that the label / print is taken cared of. ****TWICE TESTED; 1st)NO SHORTS,NO GAS AND VERY STRONG TRANSCONDUCTANCE. 2nd) TUBES ARE NOT USABLE UNLESS THEY ARE LIVE AUDIO TESTED WITH NO HUM,VERY LOW NOISE and NON-MICROPHONIC.TESTED USING MODIFIED DYNACO PAS 3 & TUBE OTL. <<<< Having,TUBE1) 28/29 usiemens & 4.0/4.1 ma TUBE2) 30/30 usiemens & 4.3/4.4 ma ,Where 18/18 is minimum and NEW start at 27/27 with Dan Nelson's newly calibrated LORENZ TV7. *****TUBES WITHOUT TEST DATA IS NOT SOUND DECISION & LISTING ADS THAT SAY'S "TEST GOOD" or "TEST STRONG" WITH HIDDEN TEST RESULTS IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES. ******INTERNATIONAL SHIPPING IS USPS priority mail.*****QUESTIONS ARE ALWAYS WELCOME.