2020/11/18 · Aijiren's Autosampler Vial for autosampler are usually divided into three types of calibers. Screw Top, Crimp Top and Snap Top, Screw Top glass Vial are available in three sizes, 8mm, 9mm and 10mm. Both Crimp Top and Snap Top are 11mm.Screw Top Glass Vial is equipped with PP Cap made of top grade polypropylene.