Culture bottles with a narrow neck for use with rubber stoppers, cotton wool plugs, sterile closures, polyurethane foam stoppers, or silicone culture plugs.– Narrow neck for rubber stoppers, cotton wool plugs, sterile closures, polyurethane foam stoppers, or silicone culture plugs – Retrace code (only bottles with print) – Autoclavable at 121°C or 134 °C – Supplied without stopper – Culture bottles with a narrow neck for use with rubber stoppers, cotton wool plugs, sterile closures, polyurethane foam stoppers, or silicone culture plugs.– Narrow neck for rubber stoppers, cotton wool plugs, sterile closures, polyurethane foam stoppers, or silicone culture plugs – Retrace code (only bottles with print) – Autoclavable at 121°C or 134 °C – Supplied without stopper –