Duke Standards, Nominal Diameter: 750 µm, Monosized, Polystyrene microspheres, NIST traceable, dry, Color: White or Colorless, Application: Particle size instrument calibration, Particle Density: 1.05g/cm³, Refractive Index: 1.49 at 589nm (25©C), Shelf Life: Minimum of 24 months
4375A