Shimano Dura Ace 7900 Double Band On Front Mech

This is an Elite road racers, super-lightweight yet durable, 10-speed derailleur that is compatible with Dura-Ace ST7900 shifters and FC7900 / FC7950 chainsets only, for optimum shifting performance.
It has a lightweight nickel-plated forged alloy chain cage, on which an outer trim is no longer required, and a hard-wearing Dura-Ace finish.
It also has an extra wide pivot link and optimised spring tension, which, when combined with the ST7900 STI lever, gives a rigid, flex free shift while delivering a smooth and light action.