High-density polyethylene construction offers distinct advantages over steel models. Inert design stands up to tough acids, corrosives and heat. Poly cans are dent-, puncture- and chip-resistant. Designed and manufactured with a unique conductive, current-carrying carbon insert embedded into rib of container, completing a ground path between cover assembly and flame arrester in spout. Self-close cap, pressure relief mechanism and dual-density flame arrester work together to prevent ignition sources from entering. FM Approved.