The most reasonably priced component used on the Kaf620-pbf Mule4000 2011 Usa Taillight(s) is the Bolt-flanged,6x16.
A sample from the products for the Taillight(s) include: Bulb,12v20/5w, Switch,brake Lamp, Wire-lead, Spring,hook Return.
The Taillight(s) assembly is constructed from several parts from which the Lamp-tail is the most expensive.