black open-topped polypropylene cap
color:black
material:polypropylene 
size:8mm ,9mm,11mm,13mm
 

We are a manufacture for PTFE and rubber products, now we are recommoneding our black open-topped polypropylene cap.

Our black open-topped polypropylene caps are used for chromagraphy vials.

These black open-topped polypropylene caps are clean, no need to wash.