Cell Factories provided by STE-Mart are compact, multi-layer, single-use cell culture systems designed for easy medium to large scale cell culture applications such as commercial production of vaccines, monoclonal antibodies or pharmaceuticals. Growth kinetics are the same as cells grow in the cell culture flasks. https://www.ste-mart.com/flashsale/2-layer-cell-factory-box-of-8-ste-mart.html