This boot leaf spring is suited for standard wear seed boots or extended wear boots with less than half the life left in them. More for a box drill that has standard boots that does under a thousand acres a year. They are not intended for new extended wear seed boots. They are not as strong as the Red E or Needham Ag springs which should be the choice when you install new extended wear type seed boots. NOT for 60 series seed boots. For John Deere 1890, 1895, 1990, 750, 1850 and 1690 models. Replaces John Deere Part# N215320, N280485 and N284055.