Solid Rubber Stopper, #12, 1lb, Each

Details:

These black stoppers are made of solid natural rubber that remains pliable over a long period of time. They are ideal for use with non-aggressive or concentrated solutions and have low sulfur content. Withstanding temperatures from -25 to 70°C (-13 to 158°F), they come in solid, one-hole, and two-hole versions. Each stopper has its size marked in raised figures, and all are 25 mm tall. They are sold in one-pound bags.