The Tube 350/400 8 Tr 4 Valve Stem is a durable and reliable inner tube designed for tires with a size of 350/400. It features a TR-4 valve stem for easy inflation and deflation. The key benefits of this product include its high-quality construction, compatibility with a wide range of tires, and ease of use. Its unique selling points are its long-lasting performance and ability to maintain optimal tire pressure for smooth and safe rides.