Rubber Stoppers / Rubber Bungs – Solid, Pack of 10 (29 mm Bottom)

These Solid Rubber Stoppers are durable, chemical‑resistant laboratory bungs designed for sealing larger test tubes, flasks, and other glassware. Each stopper features a bottom diameter of 29 mm, tapering to a top diameter of 31 mm, with a length of 32 mm. Supplied in packs of 10, they provide a secure, reliable seal ideal for everyday use in school laboratories.

Made from strong, flexible rubber, these stoppers withstand repeated handling and exposure to typical classroom chemicals, making them a dependable choice for routine science practicals.

Key Features

• Pack of 10 solid rubber stoppers
• Bottom diameter: 29 mm
• Top diameter: 31 mm
• Length: 32 mm
• Tough, flexible, and chemical‑resistant
• Provides a tight, leak‑resistant seal
• Suitable for larger tubes, flasks, and vessels

Ideal for School Science Lessons

Perfect for KS3–KS5 chemistry, these rubber bungs are excellent for:

• Sealing reaction vessels and flasks
• Preventing gas escape during demonstrations
• Safely storing liquids and samples
• Heating, mixing, and general laboratory use

A reliable, classroom‑ready staple for any well‑equipped school science department.