Rubber Stopper Solid 13 1/2 Bottom Diameter 62 mm Top diameter 75 mm Length 35 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.