2017 Air-o-Fan PTO twin fan 500gal with wide flotation tires, completely gone thru by authorized air-o-fan dealer, new nozzles, fittings, paint, etc. Model number GB 2-32, two 32in fans. Description from manufacturer below
 
This Air Blast orchard sprayer features dual fans; one standard and one reverse, together they generate high-volume turbulent air which pushes and pulls the canopy thereby exposing the underside of leaves and the innermost part of your trees. This turbulent air pattern provides optimal coverage for crops like citrus, almonds, olives, and walnuts. Additionally, the fan housing has adjustable air vanes and dual banks of nozzles which allows the grower to pinpoint the application, reduce drift, and optimize chemical use.