27262. black polypropylene hole cap, 8-425 thread, PTFE/silicone, septum thickness 1.5 mm, for use with 2 mL vial (standard opening), pkg of 100 ea. Supelco. pricing. SDS. 27273. black polypropylene hole cap, 10-425 thread, PTFE/silicone, septum thickness 1.5 mm, for use with 2 …