Features: 1. What Will You Get: This 25H chain sprocket kit includes one 146-link drive chain, one 12T front wheel sprocket, and one 55T rear wheel sprocket to meet your needs. 2. Durable Steel Material: This chain sprocket kit is made of premium steel material, offering high toughness and excellent wear resistance for long service life. 3. Perfect Fit: This 25H chain sprocket kit fits precisely to the original hole position with accurate shape and size design, reducing jamming during use and providing reliable performance. 4. Exquisite Forging Process: High-quality workmanship ensures no corrosion or deformation, with a smooth finish and compact design for a superior user experience. 5. Scope of Application: This 25H chain sprocket kit is suitable for DIY 47CC and 49CC mini motorcycles, ATVs, and pocket bikes requiring mechanical power transmission replacement. Specification: Item Type: Chain Sprocket Kit Material: Steel Weight: Approx. 320g / 11.3oz Package List: 1 x Front Wheel Sprocket 1 x Rear Wheel Sprocket 1 x Chain