Genalex Gold Lion vacuum tubes are legendary in the guitar and hi-fi audio industry for their power, clarity, resistance to feedback, and much more. The Gold Lion tubes are carefully engineered and crafted in Russia to outperform any tube on the market. These premium vacuum tubes make great replacement tubes, a fantastic way to upgrade your live amp, and a very popular method for getting the most out of your vintage tube guitar amplifier. GearNuts is very proud to offer you this top-of-the-line vacuum tubes.