Flexible modular system for safe and sterile media transfer for DURAN® GLS 80 laboratory bottles. The system is available with 4 so-called ports (connections). 5 different outer diameters of tubes (3.2 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm) can be used, a sterile pressure compensation (membrane filter 0.2 µm) is optionally available. Depending on the use, the single parts can be combined in various ways. Unused ports can be provided with a blind cap. All single parts are autoclavable. Tmax = 140°C. The system is suitable for applications in the field of HPLC or bio-technology and every process which requires a media transfer.