1)By Material.
   Glass Spheres and Microspheres
   Polyethylene Microspheres (PE)
   Silica Microspheres (SiO2)
   Poly(Methyl Methacrylate) Microspheres (PMMA)
   Metal Microspheres
   Metal-Coated Microspheres
   Polypropylene Spheres (PP)
   Polystyrene Spheres (PS)
   Cellulose Acetate Spheres
   Other Polymers Microspheres
   Yttria-Stabilized Zirconia and Zirconium Silicate Spheres
   Surfactants
2)By Diameter.
   Nanospheres (1-1000nm)
   Fine Microspheres (1-10um)
   Microspheres (10-1000um)
   Precision Spheres (1-13mm)
3)By Density.
   0.05-0.5g/cc
   0.5-0.9g/cc
   0.96-0.99g/cc
   1.00g/cc
   1.01-1.1g/cc
   1.1-1.2g/cc
   1.2-1.5g/cc
   1.6-1.9g/cc
   2.0-3.4g/cc
   3.5-4.9g/cc
   5.0-7.0g/cc
   7.0-9.0g/cc
4)By Property.
   Conductive Microspheres
   Density Marker Beads
   Flow and PIV Tracers, Seed Particles, Neutrally-Buoyant Spheres - 1.00g/cc
   Fluorescent Microspheres
   Monodisperse Microspheres and Bondline Spacers
   Paramagnetic Microspheres
   Phosphorescent Microspheres
   Photocatalytic Microspheres
   Retroreflective Microspheres
   Janus Particles
5)By Coating.
   Aluminum (Al) Coating
   Fluorescent Coating
   Fluorochemical Coating
   Gold (Au) Coating
   Nickel (Ni) Plating
   Silane Coating
   Silver (Ag) Coating
   Titania (TiO2) Coating
6)By Color.
   Clear (Translucent) Spheres
   White Spheres
   Green Spheres
   Red Spheres
   Black Spheres
   Grey Spheres
   Orange Spheres
   Yellow Spheres
   Blue Spheres
   Pink Spheres
   Violet Spheres