50ml Centrifuge Tubes are used in a variety of applications for spinning, agitation and mixing of liquids. They can also be used as a storage vessel when aliuoting larger volumes of liquid into smaller, usable volumes or as an outer insulations sleeve for smaller centrifuge tubes. These tubes have conical bottoms and are graduated for approximate volume. Available in standard or with a skirted base which allows the tubes to stand freely. All versions have black print for ease of reading.