The Bell Jar with Stopper (S.G.) is a laboratory glass apparatus used to create a controlled or vacuum environment for scientific experiments and demonstrations. It is manufactured from clear soda glass (S.G.), allowing easy observation of experiments conducted inside the jar.The bell jar has a dome-shaped structure with a smooth ground rim that can be placed on a base plate to form an airtight chamber. It is supplied with a glass stopper that helps in sealing the opening and maintaining the required experimental conditions.