Target Crimp Top Vial System, 2 mL, 12 x 32 mm Glass Vials National Scientific Tightly controlled crown formation improves seal. I-D vials with write-on patches have graduations at 0.5, 1.0 and 1.5 mL . High Recovery vials are wide opening, 1.5 mL with a 30µL reservoir. Perform sample concentrations and injections in one vial.