Designed for the Racing world, this cast aluminium brake master cylinder main body uses an 11 mm diameter piston. A laser marking indicates the diameter of the piston. This brake master cylinder concentrates the most advanced casting and machining technologies in order to obtain a final product capable of providing optimum performance. This Component is designed and manufactured to be used exclusively in racing competitions and, therefore, the product shall be installed through specific adaptors not included in the packaging of the component and by highly qualified and competent professionals working in the “racing” field. Please contact our distributor for any further clarification.