10mm Screw Thread Cap with Septa--Aijiren Vials for Clear Glass Screw Thread Vials are 2mL, 12x32mm and built with Advanced Vial Closure System (AVCS). This innovation not only prevents septa push through, but provides a stop point for the cap to prevent over- or under-tightening and provide an optimal, consistent seal every time. 2ml 10mm Screw Neck Glass Vial on Sale.