Material: Aluminum Alloy Size: 13*5cm / 5.12"*1.97" Color: As shown 1. Accurately measures bicycle chain wear, suitable for mountain bikes, road bikes, and other models, effectively extending chain and gear life. 2. High-precision scale design allows quick determination of chain replacement, improving riding efficiency and drivetrain performance. 3. Compact and lightweight caliper design makes it easy to carry and operate, suitable for everyday use by both home users and professional repair technicians. 4. One lasting metal construction resists corrosion and wear, ensuring long-term stability and accuracy. 5. Simple and intuitive test standard markings make it easy to use without special knowledge, allowing for quick chain tension testing. Package Includes:1pcs Bicycle chain measuring ruler 【Eco-Friendly and Sustainable】Made with environmentally conscious practices, this product is eco-friendly and contributes to sustainability efforts. It is designed to minimize waste and reduce environmental impact. 【High-Quality Materials】Crafted from premium, materials to ensure longevity and superior performance. Each product is meticulously tested to meet high standards of quality and safety. 【Versatile Functionality】This product is multifunctional and can be used for a variety of tasks, providing you with the flexibility and convenience needed to handle multiple uses with a single tool. 【Exceptional Performance】Engineered for high efficiency and effectiveness, this product delivers outstanding results every time. Its advanced features ensure consistent performance, making it a reliable choice for your needs 【User-Friendly Design】Ergonomically designed for ease of use, this product offers intuitive controls and a comfortable grip, making it perfect for both beginners and experienced users.