This genuine McCormick 6660345A1 seat is an OEM replacement part designed for various McCormick agricultural and industrial machines. Engineered for durability and operator comfort, it provides essential support and safety during operation. This seat is a direct fit for models such as the McCormick X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X5.100, X5.110, X5.120, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.