In laboratories, one working day is unthinkable without rubber stoppers that need to plug bottles and test tubes. These plugs prevent the liquid from leaking out of the container, but they also prevent the entry of external substances that can contaminate the contents. In laboratories, larger amounts of liquid are mostly found in tinted bottles that have screw caps, while chemicals are usually mixed in clear bottles or test tubes. These bottles and tubes have no threads and their caps are conical in shape which is ideal for closing them. test tube stoppers are very carefully designed to be safe. These are sensitive substances that are very sensitive and need special attention. Test tube stoppers are produced in different sizes. The upper end of the cap is wider than its lower end, which enables and guarantees that the cap will be suitable for different sizes of tubes or bottles.
If the contents of the test tube do not evaporate with chemicals, and thus do not create a certain pressure, then tube test stoppers without holes are ideal for you. So completely flat. However, certain chemicals that have high volatility can very easily create pressure from the gases they emit. In these cases, it is very important to use plugs with one or more holes that allow the gas to be released before strong pressure is created. In addition to this purpose, test tube stoppers with holes are also used in the laboratory as part of a larger apparatus where it is necessary to connect a large number of tubes with tubes that go from cap to cap.
Test tube stoppers are very durable and are made of very resistant and flexible guna. They react very well in contact with various chemicals, oils, they tolerate both very low and high temperatures very well. They are resistant to UV radiation.
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