The fire extinguisher selected for the Cricket is a Purple K extinguisher. The purple K extinguisher is a dry-chemical fire suppressor, mostly potassium bicarbonate, effective against class B, or fuel fires. It is partially effective against C fires, or electrical fires.
Any farm operation storing a large quantity of fuel would do well to keep one of these handy. Robby, who has experience working for a fire extinguisher company, is the team member who selected the extinguisher. (The cat helped)