Rubber Stoppers / Rubber Bungs – Solid, Pack of 10 (19 mm Bottom)

These Solid Rubber Stoppers are durable, chemical‑resistant bungs designed for everyday use in school science laboratories. Each stopper features a bottom diameter of 19 mm, tapering to a top diameter of 22 mm, with a length of 28 mm—making them suitable for sealing a wide range of test tubes, flasks, and laboratory vessels. Supplied in packs of 10, these stoppers provide a reliable and long‑lasting solution for practical chemistry work.

Made from high‑quality rubber, they offer a snug, secure fit and excellent resistance to common laboratory chemicals, making them ideal for repeated handling and routine experiments.

Key Features

• Pack of 10 solid rubber bungs
• Bottom diameter: 19 mm
• Top diameter: 22 mm
• Length: 28 mm
• Strong, flexible, and chemically resistant
• Provides a tight, reliable seal for various lab glassware
• Suitable for everyday classroom use

Ideal for School Science Lessons

Perfect for KS3–KS5 chemistry, these solid rubber stoppers can be used to:

• Seal test tubes, flasks, and boiling tubes
• Prevent gas escape during reactions
• Support experiments involving heating or mixing
• Safely store samples or solutions during practical sessions

A staple in any school laboratory, these rubber bungs offer reliability, durability, and versatility across a wide range of science activities.