SHIMANO ULTEGRA 6700. Extra material added in key areas on top and underside of hood to improve comfort and ergonomics. Small flap covers the shift mechanism to keep out dirt and debris for better performance and durability. Constructed of our new proprietary Medium Compound. COMPATIBILITY For use with 10-speed Shimano Ultegra systems in the 6700 6700 and 6703 series. Not compatible with any previous versions of Ultegra levers. Extra material added in key areas on top and underside of hood to improve comfort and ergonomics. Small flap covers the shift mechanism to keep out dirt and debris for better performance and durabil Constructed of our new proprietary Medium Compound. For use with 10-speed Shimano Ultegra systems in the 6700 6700 and 6703 series Not compatible with any previous versions of Ultegra levers