Economical yet durable, these polypropylene test tube racks are fully submersible and capable of being put in an autoclave. They are also easily stacked, when empty. They are made from a special blend of polypropylene that will cause them to sink when placed in a water bath, yet still maintain their stability, even when the water is being agitated.

The top tier of the rack features an alphanumeric reference grid, allowing you to easily make notes that correspond to a specific test tube. It features 40 holes (4 rows of 10), that have a width of 20mm.