The stainless steel wire frame and bottom is designed to securely support the bag and its contents. In addition, the polypropylene bottom also serves as a containment tray in the event of inadvertent bag leakage. Tray is safety orange in color for easy identification as a biohazard containment system. Steam sterilizable at 121°C (250°F) to maintain sterility. The small bag holder with its small footprint is ideal for benchtop use. Assembly is easy and is permanent. Sold individually.