The Zetor 78226059A is a genuine OEM seal set designed for the main brake cylinder in various Zetor tractor models. This essential component ensures a tight seal, preventing fluid leaks and maintaining consistent hydraulic pressure within the braking system. It is crucial for restoring the full functionality and safety of the main brake cylinder, especially for models with a 40 km/h speed rating. Using authentic Zetor parts guarantees compatibility and durability.