Features: Brand Good quality: This product is made of high-quality materials with excellent craftsmanship, ensuring reliable performance and long service life. Easy installation: This product is simple to install without the need for additional tools, offering a convenient setup process. Appearance matching: The design blends well with compatible components, providing a seamless look after installation. Beautiful: Designed with precision and attention to detail, this product features a sleek and attractive appearance. Portability: Compact size and lightweight construction make it easy to carry and transport. Specifications: Material: Alloy Type: 1/2/3/4/5/6/7/8/9/10 1: Approx. 32mm / 1.26 inches 2: Approx. 25mm / 0.98 inches 3: Approx. 36x16mm / 1.42x0.63 inches 4: Approx. 36x14mm / 1.42x0.55 inches 5: Approx. 30x10mm / 1.18x0.39 inches 6: Approx. 30x12x9mm / 1.18x0.47x0.35 inches 7: Approx. 30x9x12mm / 1.18x0.35x0.47 inches 8: Approx. 30x8x10mm / 1.18x0.31x0.39 inches 9: Approx. 36x9x12mm / 1.42x0.35x0.47 inches 10: Approx. 30x8x10mm / 1.18x0.31x0.39 inches Package Includes: 1 x Gear Sprocket Note: 1. Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown.