Millipore storage tank. Capacity 15 L. Material polyethylene (PE). Stores pure water (Type 2 and Type 3) supplied by Millipore equipment. Especially attachable to Millipore AFS 8D/16D models. Filter vent (not included) effectively protects from airborne contaminants. The smooth inner surface prevents the formation of biofilms. The aseptic overflow feature prevents back contamination of the drain.