Usage Tips:Features1What 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. 2Durable Steel Material: This chain sprocket kit is made of steel material, with high toughness and great wear proof performance, long service life. 3 Fit: This 25H chain sprocket kit fits closely to the hole position, accurate shape and size design, less jamming during use, accessories. 4Exquisite Forging Process: Fine workmanship, no corrosion, no deformation, beautiful appearance, small size, to provide you with use experience. 5Scope of Application: This 25H chain sprocket kit is suitable for DIY 47CC 49CC mini motorcycles, ATV, four pit pocket bikes and other mechanical power modification.SpecificationItem Type: Chain Sprocket KitMaterial: SteelWeight: Approx. 320g/11.3ozPackage List1 xFront Wheel Sprocket1 xRear Wheel Sprocket1 x Chain