Rubber Stopper Solid 000 Bottom Diameter 8 mm Top diameter 13 mm Length 21 mm
These solid, black stoppers contain a high percentage of pure rubber, weigh less than neoprene, and are low in free sulfur (1/2%).
Resilient and pliable for a long time
Low in free sulfur
Can withstand adverse laboratory conditions without hardening
Composition ensures resiliency and pliability over a long period.