Simple answer for drum storage and transport holds up to 500 lb. and includes 11-gallon sump ready to catch leaks. - 11-gallon sump for protection from minor spills and leaks - Free-rolling casters and optional handle (DRM787) make drum transport easy - Rugged polyethylene with UV inhibitors for indoor and outdoor use Lime green color makes it easy to see, even in low light or from a distance