SPECS: Material: Aluminum alloy Weight: 180g 1 pair of bike brake levers included. Installed on 2.2cm diameter handlebar Installation: First, remove the handlebar grip, adjust the screw, make screw gaps and brake handle cracks be line; Second, clench handlebar, let the hammer head of brake line into the corresponding line hole and then chucking; Third, close the lever, tighten the screws, install handlebar grip This pair of high hardness aluminum alloy bike brake levers is durable and cool Super light and don't burden strength to your bike. Suitable for many kinds of bicycles.