Cork Stopper 20-25mm Solid PK10

These solid cork stoppers provide a practical and cost-effective solution for sealing laboratory glassware such as vials, test tubes, and bottles. Made from natural cork bark, each stopper offers a firm yet flexible seal, ideal for general laboratory and classroom use. Their tapered shape ensures a snug fit across a range of container openings, and the natural material provides chemical resistance while remaining easy to insert and remove. Sold in a convenient pack of 10, these stoppers are suitable for sealing substances, preventing spills, or storing materials during short-term experiments or demonstrations.

Educational Benefits:

• Supports safe sealing and containment during experiments involving liquids or powders.
• Reinforces proper lab technique for setup, storage, and chemical handling.
• Introduces students to traditional and sustainable laboratory materials.
• Encourages the application of size selection and fitting for different glassware types.

Classroom Application Ideas:

• Use to seal test tubes containing chemical reactions or biological samples.
• Incorporate into lessons on conservation of mass by sealing vessels during reactions.
• Pair with thermometers or glass tubing for distillation and gas collection setups.
• Explore sustainability by comparing natural cork to synthetic stoppers.

Specifications:

• Pack Size: 10 cork stoppers:
• Dimensions: Bottom Diameter: 20 mm Top Diameter: 25 mm Length: 30 mm
• Material: Natural cork bark
• Design: Solid, tapered fit for versatility and secure sealing
• Application: Suitable for sealing tubes, bottles, and flasks in science experiments
• Educational Level: Primary to tertiary science labs