Shimadzu Part Number: 220-97331-51 Vials, 20mL Headspace vial only, Crimp Cap Style, 75,5 x 22.5mm, clear glass, Round bottom, 100/pk E-mail this product to a friend 20mL crimp style headspace vials for the HS-10, HS-20, AOC-5000, and AOC-6000. Requires magnetic cap for use with the AOC-5000 or AOC-6000.