Used for the recovery of product in microscale crystallizations, this borosilicate glass 2mL outer tube has a non-uniform grind that purposely allows leakage (capacity is the volume below the ground area). The PTFE plug/plunger fits outer tube. Tube and plunger sold separately. Scientists rely on the expertise and artistic skills of Wilmad-LabGlass' engineers and glass specialists to manufacture NMR and EPR consumables and laboratory glassware of the highest quality. Used daily in academia, healthcare and chemical, petroleum and other industrial applications, Wilmad offers 7000+ items as part of their standard catalog as well as custom fabrication for individual glassware, glass repair services and OEM glass parts.