New design accommodates SCUBA cylinders, Oxygen bottles, & SCBA cylinders. The modular design allows you to configure each compartment with any combination of specialized shelves and/or flat shelving for gear bags, or for turnout gear and dive gear storage / drying to meet the needs of your department. The S.O.S. Rack features four 1,050 lb capacity casters and is constructed of heavy duty steel tubing with high strength wire. A durable powder coat finish protects the rack and will provide years of service.