9 mm Screw Top Clear Glass Vial with PTFE/Silicone Septa, 100/pk. These autosampler vial, cap and septa kits make it surprisingly simple to re-stock your laboratory. 2ml Clear Glass Screw Top 8-425 Thread Vials - Aijiren. Pre-assembled with cap and septa into use to save your time. Precise bottle neck size ensure autosampler handle correctly.