Condition:100%new Be suit for YAMAHA HONDA Kawasaki Suzuki as a universal,and lever"sdiameter is22mm. Installation Base of Rearview Mirror: M10 Oiloutput Banjo: M10 x 1.25 (package in not include) Opiton:lefthydraulicclutch or rightbrakepump Materaisl: aluminium Piston :Diameter19 x length18mm Why radial? The definition indicates a configuration whereby force can be transmitted to the piston in phase with the force applied by hand to the lever, eliminating the friction that would be generated if these forces were separated. In other words, the effort exerted by hand on the lever and the force applied by the lever to the piston are both generated in the same direction radially relative to the point where the cylinder is anchored, i.e. the handlebar. With this type of construction, the master cylinder can be designed with the focus on optimizing hydraulic and mechanical ratios, and consequently on improving its performance. This means that the force applied to the lever can be converted entirely into powerful, dependable and precise braking action. For twin-disc systems; the 19x20 cylinder is great for street and track applications. ======================================= If you want to other piston, please click here.