PP. 70 mm closure, for fluid transfer in the lab or field, or with straight-sided jars. Use for siphoning, evacuation, bleeding of fluid lines, collecting samples, transferring reagents. Two vent tubes, molded into top of closure, connect to external fluid source and to vacuum or pressure pump with 6.3 mm Ø flexible tubing. Autoclavable. PP. 70 mm closure, for fluid transfer in the lab or field, or with straight-sided jars. Use for siphoning, evacuation, bleeding of fluid lines, collecting samples, transferring reagents. Two vent tubes, molded into top of closure, connect to external fluid source and to vacuum or pressure pump with 6.3 mm Ø flexible tubing. Autoclavable.