The Chaoyang 700x38/45C bicycle inner tube is designed to fit a variety of 700C size tires, particularly those with widths between 38mm and 45mm. This inner tube features a Presta valve with a length of 60mm, making it compatible with many road and mountain bikes. Made from high-quality rubber, it ensures durability and resistance to punctures, providing a reliable option for riders looking to maintain optimal tire pressure and performance. Additionally, each tube undergoes a rigorous air leakage test, ensuring quality assurance. The box showcases a vibrant red design with clear markings, reinforcing the brand's commitment to performance and reliability.