The Tube 350/400 10 Tr 87 Valve Stem is a durable and reliable inner tube designed for use in various types of tires. Its key features include a 10-inch diameter, TR87 valve stem, and compatibility with tube sizes 350/400. The benefits of this product include easy installation, excellent air retention, and resistance to punctures. Its unique selling points are its high-quality construction, long-lasting performance, and affordability.