MTS Company 0065 High Density Polyethylene Fuel Tank 1987-1995 Jeep Wrangler YJ 20 gallon plastic gas tank(Domestic model tank) MTS replacement tanks are molded in one piece and have no welds or seams to split apart and will never rust through Made of High Density Cross Linking Polyethylene, a high strength material with superior puncture resistance Will not crack even at 160 degrees below zero