Features： 1、Good Braking: 3 finger brake lever, easier to master and control, dual piston design, braking performance is strong and more reliable. 2、Anti Skid And Stable: The frosted surface of the brake lever is provided with concave holes, which increases friction, refuses to slip, brakes sensitively, brakes strongly, and has good stability. 3、Brake Lever Installation Direction: The front brake is installed on the left hand side, and the rear brake is installed on the right hand side. It is used for the braking system of ordinary bicycles, mountain bikes and road bikes. 4、Aluminum Alloy Material: Bicycle disc brake kit, selected high quality aluminum alloy material, compact, light, durable and long lasting, wear resistant, and long service life. 5、Product Size: The brake lever is 83mm long, suitable for 22.2mm handlebars. A pillar of the conversion seat brake is 74mm, and B pillar is 51mm. Conversion seat printing is F180MM/R160MM, F180/R160, F for the front, R for the back, and 160 and 140 refer to the disc diameter (mm). Specification： Item Type: Disc Brake Set Material: Aluminum Alloy Brake Lever Installation Direction: The front brake is installed on the left hand side, the rear brake is installed on the right hand side Front Disc Brake Cable Length: Approx. 0.8m / 2.6ft Rear Disc Brake Cable Length: Approx. 1.5m / 4.9ft Brake Lever Length: Approx. 83mm / 3.3in, Suitable for 22.2mm / 0.9in Handlebars Conversion Seat Brake Size: A Pillar: Approx. 74mm / 2.9in, B Pillar: Approx. 51mm / 2.0in Package List： 1 x Rear Disc Brake 1 x Front Disc Brake 4 x Screw 1 x Conversion Seat