National Packaging’s Composite drums are composed of both plastic and steel to create the best of both worlds. Usually, there is a plastic interior with a steel exterior. The inner is a blow molded plastic container made from high-density polyethylene. Our 55 gallon steel/plastic UN rated composite drum combines the strength and durability of steel with the product compatibility of high density polyethylene. It is designed for corrosives, acids, flammable liquids as well as industrial chemicals.