The tube is conical with a "skirt", designed for centrifugation of biological and other liquids. The test tube is closed with a screw cap, equipped with a stability skirt (for convenient placement in an upright position). The divisions are applied with white paint resistant to erasure. There is also a field for recording. The conical tube is made of polypropylene, which allows it to be autoclaved in standard mode. Relative centrifugal acceleration 3000g