Autosample Vial Pre-Slit Cap,9-425 HPLC 2ml Vial Screw Thread Blue caps, 9mm Cap with Red PTFE/White Silicone Liner, PK of 100: Amazon.com: Industrial & Scientific
Hydrophobic PTFE Syringe Filters 13mm Diameter 0.22μm Pore Size for Industrial Filtration by Allpure Biotechnology (Hydrophobic PTFE, Pack of 100): Amazon.com: Industrial & Scientific
Wheaton W240830 White Polypropylene Screw Cap with Bonded PTFE Faced Silicone Liner, 13-425 Size (Case of 250): Science Lab Cap Plugs: Amazon.com: Industrial & Scientific