This Brembo Rear Brake Master Cylinder with an 11mm piston in a gold color is a top-quality replacement part for your motorcycle's braking system. Designed to fit seamlessly with your existing system, this master cylinder is perfect for those looking to upgrade or replace their current braking components. Crafted with precision and using only the highest quality materials, this Brembo Master Cylinder guarantees superior performance and reliability for your motorcycle. Whether you're a professional racer or a weekend warrior, this master cylinder ensures that your braking system operates at its best, allowing you to ride with confidence and safety. So upgrade your motorcycle's braking system today with this Brembo Rear Brake Master Cylinder. Was taken off of a bike that was parted out.