Rubber 2-Hole Stoppers, 2-hole, Size No. 2 to 8, Each

Details

These black stoppers are made of solid natural rubber, which remains pliable over a long period of time. They are ideal for use with non-aggressive or concentrated solutions and feature low sulfur content. Withstanding temperatures from -25 to 70°C (-13 to 158°F), they are also autoclavable.