promethium tanks on cargo 8 ridgehauler trailerThis multipart plastic kit allows you to build a Ridgehauler Trailer with a set of Promethium Tanks, for use with a Cargo 8 Ridgehauler. You can construct this trailer with six or eight wheels, and the Ridgehauler Trailer's modular assembly options allow you to field it with a flatbed cargo bay capable of carrying gang fighters and freight goods, or with a pair of Promethium Tanks that can be built in a variety of sizes, complete with an overflow tank