Cenospheres also known as Hollow Ceramic Microsphere, are hollow particles in size typically below 500µm and with a specific gravity of below 1g/cm³, they are lighter than water, so they are always used as lightweight fillers. Cenospheres are characterized by high thermal and mechanical resistance and are available in different distribution particle sizes. They are widely used in Refractory, Foundry, Metallurgical, Lightweight cementitious, construction products, Thermoplastic Parts, Specialty Ceramic Materials, and so on. The original factory was founded in 1978, formerly known as Hebei Shahe New Refractories Co., Ltd., has been engaged in the research, production, and sales of CENOSPHERES, and is one of the earliest professional manufacturers in Hebei Province. We can supply many grades of cenospheres, grey & near white cenospheres, high Al2O3 cenospheres & economical cenospheres, a broad size of cenospheres: 75μm, 100μm, 106μm, 125μm, 150μm, 160μm, 180μm, 300μm, 450μm, 500μm, 600μm. Any further questions, please feel free to contact us, we'd pretty love to help you!