Material: The bicycle chain is made of high-quality high-quality steel, anti-corrosion, rust-proof and durable. Applicable: 9 speed bicycle Easy to install: The chain link of the magic buckle is easy to disassemble, easy to clean and reusable. Durability is ensured by heat treatment of rollers, pins and plates, and the mushrooming of the pins provides unparalleled side plate retention, allowing the chain to far exceed breaking force standards. Suitable vehicles: Bicycle chains are ideal for mountain bikes, road bikes, hybrid vehicles, folding bikes, and junior bikes.