Shimano 105 - 5600 10-Speed Chains.10-speed compatible only; not compatible with 9-speed drivetrainsUltegra 6600 and 105 5600 chains are recommended for use in conjunction with Ultegra 6703 and 105 5703 tripleItem SpecificationsColorGrayWeight304gWidth6.1mmLinks116linksNumber of Speeds10-SpeedChain CompatibilityShimano 10,SRAM 10Defined ColorSilver