One Pound of One-Hole Rubber Stoppers in Various Sizes.

• Superior grade of rubber
• Soft, resilent, and durable
• Low sulfur content
• Size numbers molded onto the top
• All stoppers are 25 mm long
• Sizes: #00 to #7

Designed to stay pliable over a long period of time, these stoppers can withstand temperatures from –25 to 70°C (–13 to 158°F). Ideal for use with nonaggressive or concentrated solutions.