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Lab Glass Stoppers are accessories used to seal lab glassware, such as flasks and test tubes, to prevent evaporation, spillage, and contamination.

Borosilicate Glass Stoppers are a type of glass stopper commonly used in laboratory settings. They are known for their high chemical resistance and heat resistance. Some common types of borosilicate glass stoppers include:

  1. Ground Glass Stopper: have a ground glass surface for a secure, airtight seal and are often used for reaction flasks and other glassware.
  2. Interchangeable Stopper: have a standardized design that allows for multiple sizes to fit a single flask, making them convenient and versatile.
  3. Serum Stopper: have a flat top design and are commonly used for storing or transporting biological samples.
  4. Screw Cap Stopper: have a screw cap design that provides an airtight seal and allows for easy removal.
  5. Septa Stopper: have a rubber septum that can be punctured with a needle to allow for the introduction or removal of gases or liquids.

These stoppers are typically made of borosilicate glass and are available in various sizes to fit different sizes of glassware. They are widely used in scientific experiments, chemical reactions, and biological studies, as well as in medical and industrial settings.

Stoppers are commonly made of materials such as rubber, cork, or glass, and come in various sizes to fit different sizes of glassware. Some common types of Lab Glass Stoppers include:

  1. Rubber Stoppers: made of rubber and are flexible, making them suitable for use with a wide range of glassware.
  2. Glass Stoppers: made of glass and are commonly used with glass containers, such as flasks and reagent bottles.
  3. Cork Stoppers: made of cork and are often used with glass containers that hold liquids, such as wine bottles.
  4. Polyethylene Stoppers: made of a flexible plastic material and are commonly used with tubes, such as test tubes.
  5. Tapered Stoppers: designed with a cone shape that allows for easy insertion and removal from glassware.

Stoppers serve a variety of purposes, including preventing evaporation and spillage, controlling air exchange, and preventing contamination. The material of the stopper, size, and shape are selected based on the specific requirements of the glassware being used.