854984. black polypropylene hole cap, 8-425 thread, PTFE/rubber septum, for use with 11.6 × 32 mm vial (standard opening), pkg of 1000 ea. Supelco. pricing. SDS. 854987. black polypropylene hole cap, 13-425 thread, PTFE/red rubber septum, for use with 4 mL vials with 13-425 thread, pkg of 100 ea.