RotopaX are the only EPA and CARB compliant fuel containers available for sale in the United States! This is thanks to a patented three-layer roto-molding process, along with specially formulated plastic barrier material to meet the governments' new extremely low permeability requirements. RotopaX (patent pending) are proudly made in the U.S.A. by the original manufacturer of the first generation fuel and water packs. RotopaX are indisputably superior products. Unique designs adds strength and provides extra tightening power. Use with included base plate or remove plate to attach mount direct by bolting up through the bottom or down through the top. Sold individually.