Our main products are: 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.