20mm Crimp Top Headspace Vial for GCMS--Aijiren HPLC Vials 20mL Amber Crimp-top Headspace Vial, Round Bottom, 22.8*75mm, 5.0 type $15.99 $15.24 $14.38 Headspace vials are a kind of laboratory vials for top space analysis, used in the process of top – gas chromatography with the features of high-temperature