Vacuum tube / Valve is one of the most important factor of tube amplifier,ChinaAudioStore supply various of tube mostly are made in China,Including SHUGUANG,FULLMUSIC,PSVANE and GUIGUANG,Some are imported such as JJ,TUNG-SOL,SVETLANA,ELECTRO-HARMONIX and GOLD-LION. ,They are all brand new and good matched.