Corning 150, 175, and 225 cm2 flasks are manufactured from optically clear virgin polystyrene, are treated for optimal cell attachment, feature a printed lot number for ease in traceability, are sterilised by gamma radiation, and are certified non-pyrogenic. The 150 cm2 flask features an anti-tip skirt for increased stability. All flasks are available with choice of cap style to match your application. Packaging: 5/pk 50/cs