This is a high-quality titanium bicycle freehub rear hub body compatible with 8, 9, 10, and 11 speed kits. Made from durable titanium and steel, it is designed for individual model wheels and is suitable for various cycling applications. The product includes a hub body with an 11mm Allen wrench and has a weight of approximately 169g. Please note that the size may have a slight manual measurement error, and the color may vary slightly due to lighting issues.