Loved by racers worldwide, the Discacciati Racing Thumb Brake System features a standard length lever design. Includes mounting bracket to bar. Discacciati has been producing Italian made sportbike components for original and aftermarket use since 1969.  This Discacciati thumb brake master cylinder works in conjunction with the Discacciati rear brake master cylinder (both billet masters included). This is popular for serious racetrack riders who want more feel and control over the rear brake. *Work in conjunction with the supplied rear brake master.  Discacciati produces race quality master cylinders and braking components using a 100% quality-control process mandating all core components to be inspected under a microscope before assembly, pressure calibrated, and vacuum tested upon final assembly.  TECHNICAL FEATURES Black Standard Lever Material: CNC-Worked 7075 Aluminum Front Piston: 13mm Rear Piston: 14mm Installation Bracket Included (Mounts to Bar) Rear Brake Fluid Reservoir Included Surface Protection: Anodized Three (3) Year Limited USA Warranty  ITEMS REQUIRED TO COMPLETE INSTALLATION If you intend to use your stock reservoir you will require a length of 6mm Tygon 2375 Tubing and 2 3/8" Spring Clamps. Dot 4 Brake fluid will be needed. We suggest replacing all of the fluid in the system when you install the master. Do NOT use Dot 5.1 Brake Fluid.  Discacciati Brake Systems are known worldwide. Discacciati Brake Systems came from the experience gained in racing and from the very beginning it was supplying brake systems to riders and teams of GP, SBK, SuperSport, SuperStock. Discacciati is worldwide performance brake system since 1984. 100% Made in Italy. MOTO-D is the exclusive North American Distributor for Discacciati Brake Systems. For more info visit www.motodracing.com