Feed Grinders/Mixers For Sale New & Used. Additional Info: Kuhn/Knight Vertial Maxx Mixer Wagon, 680 Cubic Foot Mixing Capacity, Recap Truck Tires, Hay Retention Ring, Tip Off Discharge with Magnets, DigiStar Scale System, Augers & Flighting in Good Condition, Liners are Solid. No Visible Oil Leaks, Cracks or Concerns. 1-Owner, Clean Unit.