The Case IH B503778 is a genuine OEM magnetic rotary case designed for optimal performance and durability in Case IH agricultural machinery. This essential component plays a critical role in the electrical or sensing systems of compatible tractors. Manufactured to original equipment specifications, it ensures a precise fit and reliable operation, contributing to the overall efficiency and longevity of your equipment. Compatible with various MX series models, including MX100, MX110, MX120, MX135, MX150, MX170, MX80C, and MX90C.