These 3T Aero Pro Brake Levers fit 3T aerobars, and other bars with standard handgrips. These are sold in pairs, and they fit securely over the ends of 24-mm diameter bars. They are robustly built in aluminium, with internal brake cable routing and a return spring for light action. You can use them on single and double-pivot brakes, and they take a cable with a pancake (MTB) end. At a mere 4 mm in width, these are the most aerodynamic brake levers available, and weigh just 60 g the pair.