网页8-425 (8 mm) For Use With (Equipment) 8 mm 2 mL screw cap autosampler vials. Unit Size. Pack of 100. Showing 7 of 7. Open top caps can be used with any 8mm septa. Phenolic caps are suitable for autoclaving and low temperature applications. Polypropylene caps are chemically inert and suitable for most chromatography applications.