Nearly eliminate septa push-through and improve sealing. Thermo Scientific™ 9mm Clear Glass Screw Thread Vials are 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. Vials are made from superior quality 33 expansion borosilicate clear (Type 1, Class A) glass, and meet all US, EU and JPN Pharmacopia standards. Choose from Thermo Scientific™ Premiere™, Thermo Scientific™ National™ and Thermo Scientific™ Chromacol™ brands.