Glass microspheres are hollow spheres of glass manufactured for a wide variety of uses in consumer goods, medicine, research and numerous industries from Aerospace to Automotive. Hollow glass microspheres from Ceno Technologies, sometimes termed microballoons or glass bubbles, have diameters sized in micrometers (microns). Glass microspheres from Ceno Technologies are free-flowing, high strength, low density, inert and have a wide variety of uses as a lightweight filler in composite materials, syntatic foams, paints, plastics, putties, mastics, fiberglass, sealants, varnishes, resins and cements.