This matched pair of 5U4GB rectifier tubes from Raytheon is a must-have for any vintage audio and video enthusiast. Made in the United States, they are perfect for restoring and upgrading vintage electronics and consumer electronics. With its high-quality construction, these tubes provide reliable performance and excellent sound quality. The brand, Raytheon, is known for manufacturing high-quality tubes that stand the test of time. The tubes have been tested and matched for optimal performance, ensuring that they work seamlessly together. Whether you're a collector or a musician, this matched pair of 5U4GB rectifier tubes is a valuable addition to your collection.