The crown and neck of these glass vials are formed to precise tolerances for secure crimping and improved autosampler handling. For use with 11-mm crimp seals. Vials with write-on patches have graduations at 0.5, 1.0, and 1.5 mL. For microsampling applications, order GLASTIC® vial 98811-03 with a polypropylene body and a 300-µL glass insert. Sampling efficiency is optimized and samples contact only the insert.