Rubber Stoppers, #4 to #6.5, Pk/16

All of our black rubber stoppers are laboratory grade. Each is marked on top with the size number for easy identification.

These rubber stoppers contain a high percentage of pure rubber and are low in free sulfur. The stopper composition ensures resiliency and pliability over a long period and will withstand laboratory conditions without hardening.

The upper working temperature of these black rubber stoppers is 212°F.

Contents of this set...

1. (2 ea.) Solid #4 (NC-0959)
2. (2 ea.) 1-hole #4 (NC-0926)
3. (2 ea.) Solid #5 (NC-0960)
4. (2 ea.) 1-hole #5 (NC-0927)
5. (2 ea.) Solid #6 (NC-0961)
6. (2 ea.) 1-hole #6 (NC-0928)
7. (2 ea.) Solid 6.5 (NC-0970)
8. (2 ea.) 1-hole #6.5 (NC-0917)

 Rubber Stopper Cross Reference Chart