Rubber Stopper Solid 7 Bottom Diameter 30 mm Top diameter 37 mm Length 25 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.