Usage Tips: Motorcycle Heavy Duty Chain and Sprocket Kit, Made From the Quality Metal Materials Available. Chain repeated forging, control of materials to the strength, easy to disassemble, easy to clean, reusable. Their advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life. Combination of a very high strength base material and an exceptionally hardwearing result in significantly increased chainwheel life. Not easy to damage, easy to install Size: 25H 68 Links Chain and 68 Tooth Rear Sprocket Applicable models: For 2-stroke 49cc Pocket Bike Mini Bike colour: as shown Material: metal Package Contents: 1 x Rear Sprocket 1 x Chain Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.