If you have the John Deere ProSeries Seed Boots (part numbers A109343 or A109344) you will need the Bonilla Tab for the ProSeries. This Bonilla tab for ProSeries is narrower than the standard Bonilla tab, to accommodate the narrower ProSeries seed boot profile. Be aware that some growers have reported the ProSeries seed boots plug up when seeding larger seeds at higher seed rates (especially peas and chick peas).
If you bought new ProSeries seed boots (part numbers A109343 or A109344) you will need the stainless steel bolt and clip to mount the Bonilla tab to the boot.
If you have a 50 series or 90 series boot, you will need the standard Bonilla Seed Tab.