DURABLE - DBL3710124 High-quality, System 48 Multifunction Trolley gives you two levels to store electronic devices such as printers. Raised, anti-tilt edges protect your folders and paper for safekeeping. Strong, powder-coated metal frame made of scratch-proof steel support the two hard-wearing shelves (3/4"/19mm thick). Top and bottom shelves are made from 3/4" thick, melamine-covered hardboard. Sturdy frame is equipped with fiberglass-reinforced, plastic corners. Four casters including two with brakes allow easy, seamless mobility.