Screw cap are available in 8-425 screw cap, 9mm screw cap, 10-425 cap, 13-425 cap and 24-400 cap. 8-425 screw cap for HPLC vial The 2ml HPLC Screw Vials are made from clear/ amber, Type I borosilicate and 33 expansion glass.2ml Amber HPLC Screw Vials with unique thread design ensures consistent seal and can be reused, not volatile, easy to use