2011 John Deere 637 Disk, Pintle Hitch, 9" Spacing, Hyd Down Pressure, Hyd Leveling, 21 1/4" Front Blades, 21 1/2" Rear Blades, Tandem Tires On Mainframe & Wings, 12.5L-15FI Tires, SN: 1N00637XPA0740445