For ASTM Standard Flasks
• The Flasks with ASTM E-288 can also be provided with Penny Head Stoppers

PS : Penny Head Stoppers can be provided in Amber color.

Potential Uses:

1. Laboratory Glassware Sealing: Pennyhead solid glass stoppers are often used to seal laboratory glassware such as flasks, test tubes, and bottles, providing a secure closure.
2. Chemical Reactions: In chemical reactions, solid glass stoppers are used to seal reaction vessels, preventing the escape of gases or vapors and allowing for controlled reactions.
3. Storage of Samples: In research and analytical laboratories, glass stoppers are used to seal containers holding samples to prevent contamination or evaporation.
4. General Laboratory Practices: Pennyhead stoppers are easy to handle, making them convenient for quick sealing and unsealing of laboratory glassware during various procedures.
5. Quality Control: In laboratories adhering to ASTM standards, these stoppers may be used in quality control processes to ensure that laboratory glassware meets specific criteria.