Features: and high quality Good quality: This product is made of high-quality materials with exquisite workmanship, offering reliable performance and long service life. Easy installation: This product is easy to install without the need for additional tools, providing convenient setup. Appearance matching: The design complements original equipment, ensuring a seamless fit and appearance after installation. Beautiful: Crafted with functional precision and a stylish, attractive design. Portability: Compact size and lightweight for easy portability. 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.