TESTED FOR MUTUAL CONDUCTANCE EITHER ON TV-7a/u OR BK700 TUBE TESTERS - BOTH CALIBRATED. PRICE IS FOR ONE TUBE, MANY ARE AVAILABLE. WILL TRY TO ACCOMMODATE REQUESTS FOR SPECIFIC BRANDS, PLEASE UNDERSTAND AS THEY SELL SOME MAY NOT BE AVAILABLE. PLEASE BE AWARE THAT THE PICTURE MAY NOT HAVE THE TUBE THAT YOU ARE PURCHASING, WE ARE ALWAYS ADDING NEW INVENTORY. ALL ARE GOOD, QUALITY TUBES, WITH PLENTY OF LIFE LEFT! MOST (IF NOT ALL) ARE 1950s THROUGH EARLY 1970s. VAST MAJORITY ARE 1950/1960s. MANY BLACK SMOKED GLASS! PERFECT FOR TUBE AMP ENTHUSIASTS AND GUITAR PLAYERS LOOKING TO CHANGE UP TONE! GRAB A FEW IF YOU ARE A GUITARIST LOOKING TO EXPERIMENT, WOULD BE GREAT IN A VINTAGE FENDER AMP! <div style="text-align:center"><a style="text-decoration:none" href="http://mostpopular.sellathon.com/?id=AC273349"><img src="http://www.sellathon.com/Resources/Images/countercredit.gif" border="0"></a></div> TUBES ARE GUARANTEED VINTAGE, FROM BRANDS SUCH AS RCA, SYLVANIA, WESTINGHOUSE, ADMIRAL, GE, ETC. NO RE-ISSUES, ALL ARE ORIGINAL VINTAGE VACUUM TUBES TESTING STRONG. TUBES WILL BE INDIVIDUALLY BOXED IN BRAND NEW TUBE SLEEVE.