About this item

• Size Range & Packaging: available in sizes #4-#10, each pack contains 5 stoppers for convenient lab use
• Material Specification: made from natural rubber, providing chemical compatibility
• Single-Hole Design: precision single-hole configuration allows secure insertion of tubing, thermometers, or probes
• Durability & Resistance: resilient construction resists deformation and maintains seal under repeated use and varying temperatures
• Versatile Laboratory Use: suitable for test tubes, flasks, and other laboratory vessels, supporting multiple experimental setups