9-speed 3/32â steel derailleur chainValue-priced with top performance: The 900 is the standard model in the 9-speed Connex chain series. Precision made in Germany using long-lasting, heat-treated steel and offers smooth, high performance gear changes with WippermannâÂÂs engineered design.Supplied with the exclusive, re-usable, tool-free Connex QR joining link. Compatible with all bicycle 9-Speed gear systems.