Features: This brake main cylinder assembly offer precise fitment for models like YBR125, Tianjian, and Tianji, ensuring direct replacement with not drilling or wiring changes for quick installation and enhanced braking safety. Featuring a strong 6061 aluminum alloy body with anodized finish for erosion resistance, accuracy pistons for smooth line braking, and copper fittings with seals to prevent leaks in all conditions. Designed for motorcycle owners and enthusiasts of bikes who seek stable , high performances brake upgrades to improve riding security and control. Ideal for various riding scenarios, including daily city commutes and long distance adventures, providing consistent hydraulic brake pumps performances across diverse terrains and weather. The complete hydraulic brake set includes the main cylinder, lever, reservoir, hose, and mounting hardware, delivering a cost effective solution for effortless brake systems maintenance and replacement. Specifications: Component : metal Size: about 18x16x8cm Styles: multiple for option Package Includes: 1xCylinder Assembly note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.