This is a hydraulic brake set off of a 2018 Giant Contend road bike. It's an interesting set up. The hydraulics mount directly to the steering stem. The system operates via cable levers however. So if you have cable brakes this is an easy way to upgrade to hydraulic. These brakes have maybe 50 miles on them. I liked them but they aren't compatible with clip on aero bars. I had to cut the line to the rear caliper because the line ran through the frame but I have the fitting to replace it once installed. It came off a 59 cm frame.