This replacement reservoir and cap assembly is designed for use with Wilwood’s 260-5520 Kart Master Cylinder Assembly and various RM master cylinders, providing a reliable fluid containment solution for heavy-duty industrial and automotive applications. The assembly includes a durable reservoir, a secure cap, and a diaphragm to prevent fluid leaks and contamination. With a capacity of approximately 0.4 ounces or 0.70 cubic inches, it ensures optimal fluid levels for consistent brake performance in demanding environments. Crafted for durability and ease of installation, this assembly is ideal for fleet vehicles, racing carts, and industrial machinery where reliable hydraulic fluid management is critical. Its corrosion-resistant construction and precise fit help maintain braking efficiency over extended use, minimizing downtime and maintenance costs.