Rubber Stoppers (Bungs) with 2 Holes – 27mm Bottom, Pack of 10

These Rubber Stoppers (Rubber Bungs) with Two Holes are a durable and versatile laboratory accessory, ideal for use in school science classrooms and laboratories. Designed to provide a tight, secure seal while accommodating multiple connections, they are particularly useful for more advanced practical experiments involving gas or liquid transfer.

Each stopper has a 27mm bottom diameter, a 31mm top diameter, and a 32mm length, ensuring a firm and reliable fit in larger test tubes, flasks, and laboratory vessels. The two pre‑formed holes allow simultaneous insertion of delivery tubes, probes, or thermometers. Manufactured from high‑quality rubber, these bungs are reusable and supplied in a convenient pack of 10, making them ideal for class practicals and demonstrations.

Key Features

• Pack of 10 rubber stoppers with 2 pre‑drilled holes
• Bottom diameter: 27mm
• Top diameter: 31mm
• Length: 32mm
• Two holes allow insertion of multiple tubes, probes, or thermometers
• Made from durable, flexible rubber
• Provides a secure, airtight 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. Classroom applications include:

• Conducting gas collection and transfer experiments
• Using delivery tubing and thermometers at the same time
• Creating closed reaction systems for safe investigations
• Supporting experiments involving pressure, temperature, or gas flow
• Ensuring accurate and repeatable practical setups

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 engaging hands‑on science learning.