Bicycle brake Kit?2 pairs of V-brakes (with elbows and screws), 1 pair of brake rods, 1 front brake line and 1 rear brake line. Either alone or in combination is a good choice. High-quality materials? Bicycle brakes are composed of aluminum alloy brake arms and wear-resistant rubber brake pads, which are heat resistant and not easy to deform or break. The brake lines are also made of high-quality aluminum alloy and covered with black PU leather tubes to make the lines more robust and durable. The bicycle V-shaped brake lines are made of strong stainless steel, wear-resistant and corrosion-resistant aluminum alloy. Brake line length:Rear brake line: 64.9 inches, front brake line: 29.5 inches. Bike brake handles are suitable for handlebars with a diameter of 0.87 inches /22.2 mm and can be adapted for most bikes. Easy to install:First install the brake on the bicycle, (the hole corresponds to the hole), then pass the brake line through the brake line tube, fix the position of the line tube, and then fix the brake line on the bolt, install the brake cover, adjust the length, distance and position of the brake tube, and fix the brake line. Wide application:Bike brake kits are durable and lightweight to ensure smooth riding, and are simple and portable, making them ideal for carrying around. Suitable for most bicycles, road bikes, mountain bikes, BMX bikes and V-brake bikes