Aijiren 6-20ml crimp neck GC headspace vial is made of borosilicate glass. Aijiren mainly supply autosampler vial, HPLC vial, GC vial, septa and caps, Screw Top Headspace Vials hplc system hplc instrument - Aijiren 10ml and 20ml screw thread headspace vial is widely used in Headspace and GC, GCMS application. Item No. Description.