Rubber Stoppers / Rubber Bungs – Solid, Pack of 10 (Bottom 11mm) [2667]

These solid rubber stoppers (rubber bungs) are manufactured for reliable sealing of laboratory glassware in educational and scientific environments. Supplied as a pack of 10, they are ideal for use in school science labs, prep rooms, and general laboratory work where secure closures are required.

Each stopper features a bottom diameter of 11mm, a top diameter of 14mm, and a length of 24mm, providing a tapered design that allows a snug, flexible fit into appropriately sized flasks, test tubes, and other laboratory vessels. Made from durable rubber, the stoppers offer good resilience, grip, and resistance to routine laboratory chemicals.

These solid bungs contain no holes, making them suitable for sealing containers, preventing spills, reducing evaporation, or isolating contents during short‑term storage or experiments.

Key Features

• Pack of 10 solid rubber stoppers
• Bottom diameter: 11mm
• Top diameter: 14mm
• Length: 24mm
• Solid design – no holes
• Tapered shape for a secure, flexible fit
• Made from durable laboratory‑grade rubber
• Suitable for flasks, test tubes, and laboratory containers

Ideal for School Science Lessons & Laboratory Use

These rubber stoppers are ideal for KS3, GCSE, and A‑Level science lessons, supporting a wide range of practical activities that require the safe sealing of glassware.

• Sealing test tubes and small flasks during experiments
• Preventing spills and limiting evaporation
• Supporting chemistry and biology practical work
• Teaching correct selection and use of laboratory accessories
• Providing reliable consumables for prep rooms and classrooms

Practical, durable, and essential for everyday laboratory work, these solid rubber stoppers are a dependable consumable that supports safe and effective science teaching in schools and colleges.