Polypropylene is chemically inert and suitable for most chromatography applications, and can be used when levels of inorganic ions have to be kept to an absolute minimum. Type: Screw Thread Vial. Vial Closure Size: 10-425mm. Vial Volume: 600µL. Description: Polypropylene Vials. Item Description: 10-425 Screw Thread Vial. Height: 32mm.