Features: Made of carbon steel that delivers high rigidity, ensuring durability and longevity. Plated surface adds an extra layer of protection against rust and corrosion. 116 links provide a perfect fit for most mountain bikes, easy to install and use. Specifications: Material: Carbon steel Model: 6-8s / 9s / 10s / 11s / 12s (optional) Package Size: 22.5 * 8 * 1.8cm / 8.8 * 3.1 * 0.7in Weight (approx.): 326g (6-8s); 313g (9s); 299g (10s); 271g (11s); 270g (12s) Package List: 1 * Bike Chain