Features: Achieve precise chain tension adjustment with our rear derailleur chain tensioner, ensuring smooth and continuing gear shifts for cycling performances. Features a strong chain stabilizing structure, this tensioner minimizes slacks and chain drop, offering increased safety and comfortable during ride. Great for cycling enthusiasts, city commuters, athletes, and DIY bike maintenance fan who demand quality accessory to boosts their bikes performances. Perfect for city commuting, cycling adventure, training, and competitive race, providing reliable chain stability and improved shifting efficiency. Craft from quality plastic, this light weight and rusts resistant tensioner is designs for easy installation and long timing durability. Specifications: Materials: Plastic Color: As The Picture Shows Package Weight: approx.130g Size: As The Picture Shows Package Includes: 1Pc Bicycles Chain Tensioner note: Please allow 1-2cm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks!