43 Imp Gallon Utility Flat Bottom Tank (52 US Gallons #43839) Flat Bottom Utility tank is well suited for nursery, agricultural and lawn care applications. It is the perfect choice when looking for a tank to put in the bed of a pickup truck. Our Norwesco tanks are made out of rotationally molded linear, high-density polyethylene resin that provides outstanding environmental stress crack resistance. The resin is UV stabilized.