Size: 1/2x11/128 Connecting pins: 5.20 mm Missing-Link chain connection clip included Compatible with all 12-speed derailleur systems (except SRAM flat chain systems) Diamond Like Coating Perfect gear shifting thanks to the double X-Bridge Designed specifically for electric bikes with mid-mounted motors Contains MissingLink Durability: Item no.: BD12BB126 Size: 1/2 x 11/128 Color: Black and blue Pin length: 5.2 mm Weight per 110 cells: 273 g Length: 126 links X-Series DLC DLC Technology: Extremely Durable, Extremely Precise. Unparalleled durability is achieved through precision-hardened and meticulously polished pins and inner plates. Our DLC chains are coated with a diamond-like coating, providing a long-lasting, visually appealing black beauty. Furthermore, this coating creates an exceptionally smooth surface for excellent shifting performance. minimized dirt accumulation, which reduces maintenance costs.