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, 13 & 25 mm. Vial Insert: Shell Style Insert, Conical Insert, Conical Insert with Spring.