The McCormick 6531218M91 is a genuine OEM wear ring, also known as a circle, designed for durability and precise fitment in a wide range of Massey Ferguson and McCormick agricultural tractors. This essential component helps reduce friction and wear between moving parts, ensuring optimal performance and extending the lifespan of machinery. With an outer diameter of 400 mm, an inner diameter of 360 mm, and a thickness of 12 mm, it is engineered to meet original equipment specifications.