Ideal for science classrooms and laboratories, these solid rubber stoppers help securely seal flasks and test tubes during experiments. Suitable for primary, secondary and college settings, they support safe and effective practical work in chemistry and general science.

• Made from superior quality orange rubber

• Easy to clean

• Solid bottom for leak-proof sealing

• Resistant to acids, alkalis and ammonia

• Stable at temperatures from -20°C to 70°C

• Bottom diameter: 27mm; top diameter: 31mm; length: 31mm

• Pack of 10 for group or repeated use

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