Here are Shimano’s Dura-Ace 7900 10 Speed Braze-on Down Tube Shifters. Superior Dura-Ace quality means reliability and durability. Easily fit to down tube and secure firmly for assured shifting. Fully compatible with 10-speed drivetrains. Can be used with double or triple chainsets. SIS indexed system compatible. Comes complete with SP41 gear cables, which are lubricated internally along their length with low-friction silicon grease to reduce cable friction. Weight 76 grams a pair.