The McCormick 6625987A1 is a genuine OEM right side panel designed for McCormick X4 Series tractors, including models X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X4.80, X4.90, X4.100, X4.110, and X4.120. This panel is also compatible with Landini Series 4 tractors, such as 4-060, 4-070, 4-080, 4-090, 4-100, 4-105, 4-110, and 4-120, indicating a shared component across ARGO Tractors brands. It ensures proper fit and function for the specified agricultural machinery.