网页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 Materials of construction: pp chamber, PP plunger outer housing, borosilicate glass plunger inner storage vial, silicone septa with PTFE liner, PP cap