Rubber Stopper Solid 14 Bottom Diameter 75 mm Top diameter 90 mm Length 39 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.