Printed with Label and Filling Lines, these 9mm screw neck vials are made with tightest dimensional tolerances to match leading brands like Agilent, Waters, Thermo Fisher etc. Chemically inert screw caps are made from virgin grade polypropylene and are suitable for most chromatography applications. Supplied as combo-pack with 9mm Blue PP Screw Cap with hole and Red PTFE + White Silicon pre-slit bonded Septa.