2020/10/27 · 20ml Headspace Vial is often used in gas chromatography, where samples are heated and vaporized. Therefore, Aijiren's 20ml Headspace Vial is made of borosilicate glass. Borosilicate glass is high temperature resistant and inert. The specification of Aijiren's 20ml Headspace Vial is 22.5*75mm. The types of glass are 5.0 type and 7.0 type.