The VESR Pipette eliminates blood transfer, splashing, spraying and aerosol hazards making it an optimum choice for ESR testing in the laboratory. The VESR Pipette is marked from 0 to 180 mm and features a unique fibrous filter located at the zero mark. The plug is specifically designed to be self sealing aerosol barrier. The VESR expresses in mm per hour the rate at which red blood cells settle when anti-coagulated blood is allowed to stand in a narrow tube(Westerngren). It is measured by the height of the column of clear plasma at the end of one hour.