Your lab will benefit from the carefully HPLC tested quality of our vials, as well as our Blue, 12 x 32 mm Screw Neck Cap and Preslit PTFE/Silicone Septum, 100/pk allowing for tests without chemical contamination. With an industry-leading combination of screw caps and clear glass, these Waters vials can hold 2 mL and are available in packs of 100.