For use with snap caps or aluminum crimp seal closures, these high-quality 11mm amber glass vials are 2mL, 12x32mm and fit most brands of autosamplers. 14 DWK Life Sciences Wheaton™ Headspace Vials, Crimp Top Saves time and reduces the risk of contamination. Wheaton™ Headspace Vials, Crimp Top are manufactured from clear Type I borosilicate glass.