Samples, materials and samples of various substances are usually stored in sealed tubes. Because tubes are often sold without caps, they must be purchased separately. Made of high quality polyethylene, these covers are an excellent choice.
The well-thought-out shape of the stoppers allows you to easily and quickly seal the tube, and if necessary, you can open it without effort. The stopper fits snugly against the tube so that the contents of the container will not spill.
The corks are multi-colored, so they can serve as additional filters to help differentiate the contents and reduce the risk of accidentally picking up the wrong tube.
Registration certificate of stoppers for 16 mm test tubes - No. FSZ 2011/09223 dated February 25, 2011
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