7.5 in Spacing • Single Shoot • Variable Rate Control • Sectional Control • Blockage Sensors • 17 in Discs • John Deere 1910 550 bu 3 Compartment Tow-Behind Air Cart • Tank S/N 1A81910HHGJ765329 Single Fan • 12 in Conveyor Loading System • Sectional Control • Dual 21.5Lx16.1SL Front Tires Dual 520/85R42 Rear Tires