The Tube 350/400 10 Tr 4 Valve Stem is a durable and reliable inner tube designed for tires with a size of 350/400 and a valve stem of 10 Tr 4. Its key features include high-quality construction, a secure valve stem, and compatibility with a wide range of tires. The benefits of this product include improved tire performance, reduced risk of punctures, and easy installation. Its unique selling points are its long-lasting durability and compatibility with various tire sizes, making it a versatile and essential accessory for any vehicle.