Rubber cork No. 7 one hole ( stopper )

Rubber stoppers are essential in laboratories to seal glassware, preventing leaks, contamination, and accidental spills. They are commonly used to plug test tubes, flasks, and other containers during experiments and storage. Rubber stoppers provide a tight seal, allowing for safe mixing, heating, and storage of substances. Detailed Uses: Sealing Containers: Rubber stoppers are inserted into the openings of glassware like test tubes, flasks, and separatory funnels to create a leak-proof seal. Preventing Contamination:The seal prevents the contents of the glassware from being exposed to air or other contaminants, ensuring the integrity of the samples. Safe Mixing and Handling: They allow experimenters to shake or mix solutions without the risk of spills or leaks. Various Laboratory Procedures: Rubber stoppers are used in procedures like filtrations and vacuum distillations. Connecting Tubes: They can also be used to seal off a single tube or to connect two tubes together.