It is the only 1-Drum lockable outdoor containment unit available. It has a tall headspace (25 3/4"), which allows using with drum pumps and conical funnels. The convenient "roll top" cover slides up and out of the way‚ enabling quick access to drum pumps and funnels. 100% polyethylene construction will not rust or corrode. Safe handling‚ it can be moved by forklift under the "shoulder" area or wheeled with the optional dolly. The lightweight yet rugged upper body is easily removed to load or unload drums. The lockable design provides added security for the storage of hazardous materials.