Vials 2ml Cap found in: Mass Spec Certified Vial Kits, Vial Sample S / T w / PTFE Cap 2ml Cs144, Cryogenic Storage Vials - 48mm, 2ml, LC Certified Vial.. and 2.0ml screw cap vials molded from high precision mold and high purity resin. Screw caps deliver leak-proof seal for all types of contents, ideal for life science reagent or solution.