The McCormick 3531779M91 is a genuine OEM hydraulic pump seal kit designed for a wide range of agricultural machinery, including various Massey Ferguson, Landini, and McCormick tractor models. This essential seal kit ensures the proper functioning and maintenance of the hydraulic pump system, preventing leaks and maintaining optimal hydraulic pressure. Manufactured to original equipment specifications, it guarantees reliable performance and a precise fit for compatible models. Confirmed dimensions are 101.6 mm length, 101.6 mm width, and 25.4 mm height, with a weight of 0.05 kg.