Rubber Stoppers - Mixed Bundle - Pack of 50

This mixed bundle of rubber stoppers is ideal for science experiments in primary, secondary and college settings, helping teachers securely seal laboratory glassware. Designed for versatility, the pack includes a range of sizes and types to suit various practical needs.

• Pack of 50 rubber stoppers in assorted sizes and types (solid, one-hole, two-hole)

• Made from high-quality red rubber with Shore hardness 46–55

• Resistant to dilute acids, alkalis and ammonia

• Temperature range: -30°C to 70°C

• Please note: Extreme care must be used when inserting glass into the holes in rubber stoppers.  

• Pack of 50. Includes packs of 10 stoppers of each of the following sizes:

  • Solid: 13 x 16mm

  • Solid: 19 x 22.5mm

  • Solid: 31 x 36mm

  • One Hole: 19 x 22mm

  • Two Hole: 31 x 36mm