The in vitro cultivation of animal and plant cells in a nutrient medium is an essential part of today's research in the field of microbiology. These cultivation approaches can take place at different scales - the vessels are selected accordingly. For test runs, rather small vessels such as culture tubes are used. In addition to culture tubes made of DURAN®, our product range also includes culture tubes made of soda-lime glass. This is a glass of the third water resistance Class And belongs to the category of soda-lime glasses with a high proportion of alkali and alkaline earth oxides. This screw cap is used to close culture tubes with threads (threads not according to DIN).