Features: Durable: The folding-bicycle chain link is made of high-quality aluminum alloy material and is made of CNC-processing, which has a long service life.Light weight: small accessories, easy to install.Folding-bicycle chain replacement accessory: It is a perfect replacement for your old or broken one.Applicable objects: Single speed conversion chain tensioner, suitable for folding-bicycles.Adjustable: Chain tension adjusters are suitable for folding-bikes to make your ride smoother. Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: Aluminum Alloy Package List:1*Folding-Bicycle Chain Tightener