GL45 PP Screw Cap 2 x GL14 ports. Materials used: PP and PTFE. Flexible modular system. Four different tubing diameters (1.6 mm; 3.0 mm; 3.2 mm and 6.0 mm) can be connected. Sterile pressure equalisation is possible through use of syringe filter. Unused ports can be sealed off a blind cap. Used for the safe transfer of liquid mediain a closed and sterile system (evaporation is reduced).