China Chromatography Vials manufacturer, Glass Vials, GC Vials Screw: Screw Headspace vial, 6-20mL with Magnetic Screw Cap. GC Vials Crimp: Crimp Headspace Vial, 6-20ml with Aluminum Crimp or Magnetic. Sample Vials: 20-60ml EPA. VOA Vials, 24-400 Neck. Syringe Filter: Nylon, PTFE, PVDF, MCE Vial