Rubber Stoppers (Bungs) with 2 Holes – 15mm Bottom, Pack of 10

These Rubber Stoppers (Rubber Bungs) with Two Holes are a versatile laboratory essential, designed for use in school science classrooms and laboratories. They provide a secure seal while allowing two pieces of tubing, glassware, or probes to pass through simultaneously, making them ideal for more advanced experimental setups.

Each stopper has a 15mm bottom diameter, 18mm top diameter, and a 24mm length, ensuring a snug fit in compatible test tubes and flasks. The two pre‑formed holes support controlled transfer of gases or liquids, or the simultaneous use of apparatus such as delivery tubes and thermometers. Manufactured from durable rubber, these bungs are reusable and supplied in a convenient pack of 10.

Key Features

• Pack of 10 rubber stoppers with 2 pre‑drilled holes
• Bottom diameter: 15mm
• Top diameter: 18mm
• Length: 24mm
• Two holes allow multiple tubes or probes to be inserted
• Manufactured from durable, flexible rubber
• Provides a secure and reliable seal
• Reusable and suitable for regular school laboratory use

Ideal for School Science Lessons

These two‑hole rubber bungs are ideal for KS3, GCSE, and A‑Level science lessons, particularly in chemistry and physics, where controlled and more complex experimental systems are required. Typical classroom applications include:

• Conducting gas collection and transfer experiments
• Using delivery tubes and thermometers simultaneously
• Creating closed reaction systems for safe investigations
• Supporting experiments involving pressure and gas flow
• Enabling accurate and repeatable results in practical work

Robust, adaptable, and easy to use, these two‑hole rubber stoppers are an essential addition to any school science equipment collection, supporting safe, structured, and high‑quality practical science learning.