CS-9-100 Cork Stopper, Size 9 (Pack of 100)

Quality, laboratory grade cork stoppers.

• These lab-grade cork stoppers are size 9. Size 9 stopper is approximately 9/8 inches tall, 59/64 inches in diameter, and 47/64 inches bottom diameter. They are sold in a pack of 100 stoppers.
• The natural cork has imperfections including holes. Sealing Test Tubes and Flasks: Use cork stoppers to securely close test tubes, flasks, or other glassware during experiments to prevent spills and evaporation.
• The cork is safe for use with food products. Density Experiments: Use cork stoppers as floating objects to demonstrate buoyancy and density in water. Lab grade cork stoppers will have natural imperfections and holes.
• Porosity – Natural cork is slightly porous, allowing limited airflow, while synthetic cork offers a more airtight seal.
• DIY Lab Equipment: Cork stoppers can be modified to hold thermometers, pipettes, or glass tubing, making them essential for custom lab setups.