Features1Steel Material: Made from steel, this 25H chain sprocket set is strong, durable, wear proof, rust resistant, not easy to damage and has high toughness. 2What Will You Get: This chain sprocket kit includes one 25H 146 link drive chain, one 25H 15T 10mm H hole front sprocket and one 25H 80T 29mm rear sprocket to meet your needs. 3Wide Compatibility: This 25H chain sprocket set is suitable for DIY 47CC 49CC mini motorcycles, ATVs, dirt bikes, pocket bikes and other modification. 4Enhance Performance: The precise 15T front and 80T rear sprocket are designed to improve the overall performance of your bike, providing a smoother and more efficient ride. 5 Fit: This 25H chain wheel sprocket kit fits closely to the original hole position, accurate shape and size design, less jamming during use, accessories.SpecificationItem Type: 25H Chain Sprocket KitMaterial: SteelWeight: Approx. 587g/20.7ozFront Sprocket Inner Diameter: Approx. 10mm/0.39inRear Sprocket Inner Diameter: Approx. 29mm/1.14inPackage List2 x Sprocket1 x Chain