11-speed Nickel plated with Stainless SteelConnexâs best-selling option: The intelligent material mix of stainless steel and innovative nickel coating provide maximum resistance to wear and tear. Precision made using premium steel in Germany. The performance-optimized plate design guarantees precise, lightning-fast shifting.Stainless steel inner links and rollers for maximum strength and durability.Nickel plated steel outer plates for corrosion resistance and clean looks.Supplied with the exclusive, re-usable, tool-free Connex QR joining link.Compatible with all bicycle 11-Speed gear systems.