The McCormick 6640957A1 is a genuine OEM seal ring designed for various McCormick MC series tractors. This high-quality sealing component features an inner diameter of 80 mm, an outer diameter of 100 mm, and a thickness of 10 mm, crucial for maintaining optimal system integrity and preventing leaks in agricultural machinery. It is compatible with models such as MC100, MC105, MC110, MC115, MC120, MC130, MC135, MC140, MC150, MC80, and MC90.