The product is a set of four brand new Genalex Gold Lion KT88 vacuum tubes, manufactured in the Russian Federation. These high-quality vacuum tubes are known for their excellent performance and durability, making them a popular choice among musicians and audio enthusiasts. With the trusted Genalex brand and specific model number KT88, these tubes are sure to enhance the sound quality and reliability of any amplifier system. Perfect for guitarists and bassists looking to upgrade their equipment with top-notch components.