Shimano Ultegra 6600 10 Speed ChainHyperglide (HG) series 10-speed compatible chain, recommended for Ultegra drivetrains Features: HG technology has chamfered inner plates to optimise shifting performance on HG sprockets Durability is assured through a chromising treatment on link pins, and the heat treatment of rollers, pins, and plates Mushrooming of the pins gives unsurpassed side-plate retention, enabling the chain to far exceed the BS/ISO standard for breaking force 5.88mm chain width, optimised for 10-speedSuperNarrow HG drivetrains Zinc-alloy silver finish on outer plates, and grey finish on inner plates increase corrosion resistance Link: 114 Weight: 280gA 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products) Buy Shimano Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.