Fabricated from low extractable borosilicate glass, these melting point capillary tubes will not react with organic compounds. Capillary tubes are closed at one end and packed in vials containing approximately 100 tubes. 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.