Each standard consists of a population of microspheres surface labeled with a single fluorochrome at a high intensity level. The Right Reference Standard™ microspheres approximate the size of human lymphocytes (~7-9μm). With their narrow fluorescence CVs, Right Reference Standard™ products are suitable for alignment purposes. These standards may also be used to QC a specific path of the optical system (laser/filter/PMT), and to establish a unified fluorescence range for a particular detector.: