Extracellular vesicles (EV) including exosomes, microvesicles, or apoptotic bodies are evaluated to understand their role in disease states, cancer progression, and for improvements in drug discovery and delivery methods. Due to their small size (between 50 nm and 1 µm), these particles are difficult to detect using traditional methods, and require extra processing to segregate or characterize from debris commonly found in biological samples. Flow cytometry analysis of nano-, submicron-, and micron-sized EVs require instrument quality control and daily sensitivity measurements. Bangs’ provides consistent and accurate size standards and calibration beads that will give you peace of mind that your results are consistent and accurate for each run.