Vials for GC, HPLC, Headspace, IC, TOC and storage. Our autosampler vials are made from 1st hydrolytic class glass under strict hygienic conditions. Vials, 20mL Headspace vial only, Crimp Cap Style, 75,5 x 22.5mm Vials, 20mL Headspace vial only, Crimp Cap Style, 75,5 x 22.5mm, clear glass, Round bottom, 100/pk. How you use a vial crimper - YouTube