The Spacer bars for a Deere machine install in between the separation grate and the frame it bolts to, dropping your separation grates 1/2″ on each side of the machine.  The machine comes with round spacers that drop down just one side of the grates, leaving an un-level separating section.  By evening this out, we get better flow of stems and leaves through the machine, increasing capacity and effectiveness of the Disruptor kit.  There are 8 needed for most STS and S Series Deere machines, with only 6 being needed for S680 and S690’s.