Rubber Stoppers (Rubber Bungs) – 2 Hole, 13mm Bottom (Pack of 10)

These 2‑hole rubber stoppers, also known as rubber bungs, are compact, high‑quality laboratory components designed for securely sealing small glassware while allowing two separate connections through the stopper. Supplied in a practical pack of 10, they are ideal for routine use in school and college science laboratories.

Each stopper has a 13mm bottom diameter, 16mm top diameter, and a 24mm length, making them suitable for small flasks, test tubes, and reaction vessels. The two pre‑drilled holes allow simultaneous insertion of tubing, thermometers, or delivery tubes, enabling more complex experimental setups.

Manufactured from flexible, durable rubber, these bungs provide a secure, airtight seal while remaining easy to insert and remove without damaging delicate glassware.

Key Features

• 2‑hole rubber stoppers for laboratory applications
• Bottom diameter: 13mm
• Top diameter: 16mm
• Length: 24mm
• Supplied in a pack of 10
• Allows two tubing or probe connections
• Flexible rubber for a secure, reliable seal

Ideal for School Science Lessons & Practical Experiments

These 2‑hole rubber bungs are well suited to KS3, GCSE, and A‑Level science lessons, enabling students to build and investigate more advanced experimental apparatus.

• Connecting gas delivery and pressure‑release tubes
• Allowing use of a thermometer alongside tubing
• Supporting gas generation and collection experiments
• Constructing more complex chemistry reaction setups
• Encouraging safe, repeatable student practical work

Compact, versatile, and reliable, these 2‑hole rubber stoppers are an essential laboratory consumable that supports safe experimentation and effective science teaching in the classroom.