black polypropylene cap, thread for 8-425, for use with 2 mL vial (standard opening), pkg of 100 ea. Expand. Hide. Z291668. black polypropylene, open-top, 8-425 thread, pkg of 100 ea. Expand. Hide. 27271. black polypropylene cap, for use with 2 mL vial (large opening), pkg of × 100 ea.