Feature:1. The worn chain does not move smoothly and the sprocket wears faster.2. Fine workmanship, easy to replace old or damage chain.3. All chains are strong and durable, long life.4. Easy to use, convenient and practical.5. Suitable for electro‑tricycle, electric scooter, electric bicycle.6. 4 different types for you to choose, meet your different needs.Spec:Condition: 100% brand newItem type: Electric Scooter ChainMaterial: iron​Color: As picture shownScope of application: ScooterOptional type: 25H chain, T8F chain, 420 type chain, 428 type chainModel: T8F chainNumber of sections: 120 sectionsInner diameter: Approx. 4mm/0.16inAdaptation: 54 tooth sprocketModel: 25H chainNumber of sections: 114 sectionsCircumference: Approx. 74cm/29.1inInner diameter: Approx. 3mm/0.1inModel: 420 type chainSection Pitch: Approx. 12.7mm/0.5inNumber of sections: 70 sectionsCircumference: Approx. 889mm/35inInner diameter: Approx. 6mm/0.2inModel: 428 type chain double-row chainNumber of sections: 102 sectionsInner diameter: Approx. 7.5mm/0.3inPackage List:1 x 25H chainor1 x T8F chainor1 x 420 type chainor1 x 428 type chain