Vacuum tubes for venous blood collection "UNIVAC" with different fillers. The tubes are manufactured in the factory and contain industrially dosed vacuum and reagents necessary for the analysis. The vacuum in the tubes ensures the capture of a precisely specified volume of blood, which ensures compliance with the correct ratio of blood and reagent. Designed for all types of laboratory studies of venous blood. Registration № РЗН 2015/2307 от 19 мая 2017; ТУ 9398-035-59879815-2014.