About This

• Comes in 10-Pack, size: 4#; StonyLab premium silicone stoppers provide exceptional seal for lab bottles, vials and other containers
• Exhibit excellent resilience and retain pliability over a long period; resistant to chemical reagent and heat; can withstand high temperature up to 200 degrees Celsius
• With good sealing performance and can effectively prevent solution leakage; please note these rubber stoppers are not food grade
• Durable and reusable; please read the dimension description image carefully before making a decision (might have 1mm measurement error)
• Warranty: StonyLab 1-year limited warranty; if received damaged, please contact us immediately; we will solve it until satisfied