Shimano Ultegra CN-6600 10-Speed Chain – Hyperglide 10-Speed chain – Ultegra 6600 and 105 5600 chains are recommended for use in conjunction with Ultegra 6703 and 105 5703 triple – Optimized chain for HG sprocket which provides a fast and precise rear shifting performance (especially during downshifts) – Chromized rivet pins improve wear resistance – Zinc-alloy plated outer link surface treatment – Chain Connection Type: Pressed Pin – Color: Silver/Gray – Defined Color: Silver – Drivetrain Speeds: 10 – Half Link Chain: No – Links (links): 116 – Weight: 280 grams – Width: 6.1 mm