STaK-Chex Plus Retics is a whole blood five-part differential hematology control that monitors all parameters, including reticulocytes and nucleated red blood cells. The assay contains automated and manual reticulocyte values in three clinically significant control levels and nucleated red blood cells in one level. It is the only combined hematology control that includes all CBC parameters, reticulocytes and nucleated red blood cells, which can be analyzed in a single run. The precision and accuracy of the instrument’s laser is controlled each time STaK-Chex Plus Retics is analyzed. The control features cap-pierceable vials for autosampling. Its long shelf life reduces the number of shipments, associated costs and time spent performing lot-to-lot correlation. Each vial label is barcoded to assist with quality control data collection, eliminating the possibility of transcription errors. STaK-Chex Plus Retics is compatible with the Beckman Coulter UniCel DxH 800, LH 750/755, LH 500 and HmX hematology analyzers.