Black Dyed Uniform Polystyrene DVB Microspheres, Nominal Diameter: 200 µm, NIST, NIST traceable, dry, Black, Application: Cleaning Evaluation, High Contrast Reference and Calibration, Particle Density: 1.05g/cm³, Refractive Index: 1.59 at 589nm (25©C), Shelf Life: Minimum of 24 months
BK200T