39 knife slots. For John Deere combines S650, S660; S670, S680, S690, S760, S770, S780, S790 with 44 blade fine cut chopper and standard vane tailboard or Powercast™ tailboard without Wag deflector.
39 knife slots. For John Deere combines S670, S680, S690, S760, S770, S780, S790 with 44 blade fine cut chopper and PowerCast™ tailboard with Wag deflector.