Ideal for science experiments in primary, secondary and college settings, these rubber stoppers with one hole help teachers and students safely seal laboratory glassware during practical activities. Designed for reliable chemical resistance, they are suitable for a range of science investigations and demonstrations.

• Made from durable rubber, resistant to acids, alkalis and ammonia

• Bottom diameter: 17mm; top diameter: 20mm; length: 26mm

• Orange in color, with one hole.

• Temperature stable from -20°C to 70°C

• Supplied in a pack of 10 for classroom use

• Easy to clean after experiments

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