This is a heavier duty boot spring that gives more force pressing the boot to the disc than OEM and out lasting it. These are made in Mid-west America. For John Deere 1890, 1895, 1990, 1590, 1690, and 1860 models. Replaces John Deere Part# N215320, N280485 and N284055. For John Deere 1890, 1895, 1850, 750, 1990, 1560, 1590, 1690, and 1860 models.