Shimano Ultegra CN-6600 10-Speed ChainsHyperglide 10-Speed chainOptimized chain for HG sprocket which provides a fast and precise rear shifting performance (especially during downshifts)Chromized rivet pins improve wear resistanceZinc-alloy plated outer link surface treatmentUltegra 6600 and 105 5600 chains are recommended for use in conjunction with Ultegra 6703 and 105 5703 tripleItem SpecificationsColorSilver/GrayWeight280gWidth6.1mmLinks116linksNumber of Speeds10-SpeedChain CompatibilityShimano 10,SRAM 10Defined ColorSilver Shimano CN-6600 Chain Chains UPC: 689228077119