Heil Trailer (also known as Heil, J & L Tank) is a manufacturer of transport trailers for petroleum, dry bulk materials, stainless steel, crude oil, asphalt, cryogenic, and defense applications. It manufactures aluminum and stainless tank trailers, dry bulk pneumatic trailers, and monitoring and fleet management systems. The company supplies products to operators in petroleum distribution, bulk material transport, chemical transport, food-grade transport, and military logistics.