The 4221590M91 is a genuine OEM Steering Box Kit designed for McCormick CX series tractors and a wide range of Massey Ferguson models, including the 3000, 3100, 3600, 4200, 4300, 5400, 6100, 6200, 6400, 8100, and 8200 series. This essential kit ensures precise steering functionality and is manufactured to original equipment specifications for reliable performance and durability. Weighing approximately 0.12 kg, it is a critical component for maintaining the steering system of compatible agricultural machinery.