- All of our black rubber stoppers are laboratory grade.
- They contain a high percentage of pure rubber and are resistant to chemical attack.
- Stopper composition ensures resiliency and pliability over a long period.
- Withstands laboratory conditions without hardening.
- The upper working temperature is 212°F.
Fits these Test Tubes:
See our Rubber Stopper Size Chart for top, bottom and length specs of our other stoppers.