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Polystyrene Spheres are highly spherical plastic particles in sizes between 1mm and 7mm. Large, highly-spherical particles of density greater than 1g/cc are a useful tool as reference particles in simulation experiments and process troubleshooting. Polystyrene spheres are supplied in dry powder form.
Other colors, sizes and grades of large spherical particles are available:
Spherical Microparticles (Colors, Fluorescent, Phosphorescent, Barium Sulfate)
Spherical Particles: > 99%
Material Safety Data Sheet - Polystyrene Spheres
Phosphorescent Polymer Spheres - 1.04g/cc 5.9mm
Polystyrene Microspheres, Crosslinked, 1.07g/cc - 9.5um and 105um
White Polymer Spheres - 1.8g/cc - 5.9mm
Cellulose Acetate Polymer Spheres - Large Plastic Beads ~1.3g/cc - 1mm to 12mm - All Colors