The McCormick 3540423M91 is a genuine OEM hydraulic valve cartridge designed for various McCormick agricultural tractors. This essential component ensures proper hydraulic system function and is compatible with models including the MC105, MC115, MC135, MTX110, MTX120, MTX135, MTX150, MTX165, XTX145, XTX165, XTX185, XTX200, and XTX215 series. Weighing approximately 0.12 kg with dimensions of 95 mm length and 51 mm diameter, it is a direct replacement part for maintaining optimal machine performance.