20ml Headspace Vials for GC Analysis. Aijiren has been producing chromatography consumables for more than 10 years,during which time Aijiren has accumulated rich experience. 10ml Crimp Top Headspace Vial on Stock. Aijiren's 10ml Crimp Headspace Vial has passed SGS certification and needs to be used with 20mm Hand Crimper and Decrimper.