Mass Spec Certified Vial Kits. J.G. Finneran. Size, Particle/mL/Vial Mass Spec Vials are available with or without graduated marking spots. You may choose from bonded PTFE/Silicone or bonded PTFE/Silicone with slit septa. Our sealed and re-closeable container includes: 100 - Certified 2.0mL screw thread vials 100 - 9mm royal blue closures