The 10-Speed Chain Pins from Shimano are genuine Shimano replacement parts. This pack contains 3x pins. They are chain connecting pins for Shimano Dura Ace CN-7900 and CN-7801 chains. Each pin has a length of 5.85mm and weighs 2g. Made in Japan from steel, these pins are silver in color and designed for super narrow 10-speed HG and HG-X chains. Note: Not compatible with CN-7800.