NON-TREATED FLASKS for hybridoma and suspension cultures, in clear premium grade polystyrene, sterile, certified RNase, DNase, DNA and pyrogen free, non-cytotoxic. The two-position white plug seal cap lets you choose secure manual venting or an airtight seal. Accurate graduation is moulded into each flask facilitating the filling. On each bag “NON-TREATED” written indication and lot number are present to ensure an easy traceability.