Different sizes of Flexsafe® RM bags: 1 L, 2 L and 10 L total volume can be used with the Biostat® RM TX rocking motion platform, providing a working volume of up to 5 L. The Flexsafe® RM TX bag has been intelligently designed with features including a special port for gravity harvesting and an internal cell retention membrane, making it ideal for perfusion culture of cellular products such as CAR-T cells.