This heavy-duty metal, specimen box has a combination lock so the courier does not have to worry about a key access. 20-guage, white powder coated galvanized steel with its piano hinge provides for rust free and trouble free service. Thick insulation protects specimens inside. Biohazard label and locks meet OSHA/HIPPA requirements. Heavy duty steel resists dents and bending. Fully gasketed doors to prevent water from leaking inside the box. Over the door metal strap secures to locked door. Fits doors up to 1-3/4″ thick. Chain is attached to the door to provide mini work table and helps eliminate specimens from falling on the floor.