LARGE LOT NINTY TUBES. POWER OUTPUT AMPLIFIER TUBES. POWER PENTODES ALL 90 TUBES NOS NIB. MADE WITH DOUBLE GETTER BLACK PLATES ONE GETTER SIDE PLATE ONE GETTER TOP OF MICA. VINTAGE TUBES MADE IN THE UNITED STATES. LARGE PILE OF NOS NIB TUBES SAME TYPE. HIGH QIALITY SYLVANIA MADE TUBES FOR TUBE AMPLIFIERS.