Solid Rubber Stoppers (Bungs) – 15mm Bottom, Pack of 10

These Solid Rubber Stoppers (Rubber Bungs) are a reliable and practical laboratory accessory, ideal for use in school science classrooms and prep rooms. Designed to provide a secure seal, they are commonly used to close test tubes, flasks, and other laboratory vessels during experiments.

Each stopper features a 15mm bottom diameter, a 18mm top diameter, and a 24mm length, ensuring a firm and stable fit in appropriately sized glassware. Made from durable solid rubber, these bungs are reusable and resistant to wear, making them suitable for repeated classroom use. Supplied in a convenient pack of 10, they are ideal for both individual practicals and group work.

Key Features

• Pack of 10 solid rubber stoppers
• Bottom diameter: 15mm
• Top diameter: 18mm
• Length: 24mm
• Manufactured from durable solid rubber
• Provides a secure seal for laboratory glassware
• Reusable and suitable for regular classroom use
• Ideal for science labs and prep rooms

Ideal for School Science Lessons

These rubber bungs are well suited to KS3, GCSE, and A‑Level science lessons, supporting safe and effective practical work across chemistry and physics. They are commonly used for:

• Sealing test tubes, boiling tubes, and flasks
• Conducting gas collection and reaction experiments
• Preventing spills during controlled investigations
• Supporting safe handling of liquids and gases
• Enabling repeatable experiments in supervised practical sessions

Simple, robust, and dependable, these solid rubber stoppers are an essential component of any school science equipment collection, helping to ensure safe, organised, and successful practical science lessons.