Motorcycle Brake Master Cylinder Oil Cup Material: made of impactresistant plastic for durability and lightweight handling. External brake oil reservoir: functions as an additional brake oil pot to reduce the number of times brake oil needs to be added. Installation: designed to connect with the brake fluid reservoir; simple installation with no complicated tools required, easy to use. Performance and reliability: robust plastic construction supports steady oil supply and reliable braking performance. Compatibility and fit: suitable for motorcycles that use a brake fluid reservoir configuration compatible with an external oil cup. Size and design: compact and unobtrusive, making integration straightforward without clutter. Use scenarios: For longdistance rides or tours where frequent topping up is inconvenient, to minimize maintenance stops. During routine brake system maintenance or upgrades to simplify oil management. On bikes with difficulttoreach reservoirs, helping to keep brake fluid topped up without disassembly.