AffiBEADS® Polystyrene Particle Size Standard Kit, Flow Cytometry Grade, 2.5E6/ mL, 6x5 mL, 2.0-2.4 µm, 3.0-3.4 µm, 5.0-5.9 µm, 7.0-7.9 µm, 8.0-12.9 µm, & 13.0-17.9 µm