Frac sand plays an important role in the process of fracturing the shale to release natural gas, oil, and natural gas liquids from pores in the rock. For bulk storage and transportation of frac sand in the petroleum industry, specialized dry bulk trailers or pneumatic dry bulk trailers are used. Pneumatic dry bulk trailers offer vacuum-sealed storage and protection to the transported frac sand from moisture and contaminants present in the outside air. These tankers are capable of loading and unloading the frac sand via pneumatic air, saving cost and delay to the business. Pneumatic bulk trailers are usually composed of aluminum and are available in various capacities ranging from 560-3120 cubic feet.