SureStop Vials and AVCS Caps | Thermo Fisher Scientific - UK. SureStop vials are designed as part of the Advance Vial Closure System (AVCS) and remove any subjectivity around achieving the optimal seal compression when closing a vial. Below are 2mL, 12x32mm vials in clear and amber glass with 9mm screw thread vials for use with AVCS caps to provide the ultimate in sample security. VWR 11 mm Standard Opening Crimp-Top Clear Glass Vials, 100 . Find many great new & used options and get the