10ml Crimp Vial Factory–Aijiren Vials for HPLC/GC Headspace crimp vials, the value have 6ml,10ml, 20ml clear and amber to choose, the bottom have flat,rounded and rounded-flat,etc. Match with crimp cap for GC analysis. 20mm Crimp GC Vials. Aijiren is a manufacturer specializing in 6ml 20mm Crimp-Top Headspace Vial.