Test Tube Rack - Poly, 18 x 25 mm

These Silicone Stoppers (12 mm) are designed to seal test tubes safely and securely during experiments. Made from durable silicone rubber, they withstand exposure to heat and chemicals, making them ideal for repeated use in school science labs. Their flexibility ensures a snug fit while maintaining a secure seal - perfect for experiments involving shaking, heating, or storage.

Educational benefits:

• Teaches students how to safely seal test tubes during experimentation
• Allows safe storage and mixing of substances in labware
• Reduces the risk of spills or contamination

Classroom ideas:

• Use to seal test tubes during chemical reactions
• Include in practical kits for activities involving liquid agitation
• Store student samples over time for extended observations

Specifications:

• Top diameter: 15 mm
• Base diameter: 10 mm
• Height: 16 mm
• Fits test tubes with a 12 mm opening
• Pack of 100