PTFE Silicone Septa: 9X1mm Septa Septa, Aluminum Cap Septa, Magnetic Screw Cap Septa. Bonded Cap: Septa Glued on Cap, So septa not Fall from Cap. Autosampler Vials: 2ml Chromatography vial 12X32mm, 4ml vial 15X45mm. GC Vials Screw: Screw Headspace vial, 6-20mL with Magnetic Screw Cap.