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Tube has a Hi-Vac valve to control flow. The 25 ml and 50 ml tubes have 0 - 3 mm valves, and the 100 ml and 250 ml tubes have 0 - 5 mm valves.
Unit of Measure

Capacity

 N/A 25 mL

Overall Height

 N/A 165 mm

Stem OD

 N/A 9 mm