Cenosphere is a glass hard, inert, hollow silicate sphere. Cenosphere is generally used to reduce the weight of plastics, rubbers, resins, cement, etc.Characteristics:Lightweight, free-flowing, gray or off-white color, spherical, inert, heat resistant and fire proof.We have our own factory to produce cenospheres which is engaged in producing cenospheres ,and the annual production capacity is 6,000 tons .We were certified by ISO9001 in 2006.Visit our website: http://bangde.web.h114.cn/ to get more details.