I-Cenosphere(ubuhlalu obuntantayo) uhlobo lwebhola elingenalutho lempukane elingantanta phezu kwamanzi.Imhlophe ngokumpunga, izacile futhi iyigobongo inesisindo esilula.Isisindo sayo sevolumu singama-720kg / m3 (isisindo esinzima), 418.8kg/m3 (isisindo esilula), usayizi wezinhlayiyana cishe ngu-0.1mm, ubuso bawo buvaliwe futhi bushelelezi, ukuqhutshwa kwayo okushisayo kuncane, futhi ukumelana nomlilo ≥ 1610 ℃.Kuyinto enhle yokugcina izinga lokushisa le-refractory, esetshenziswa kabanzi ekukhiqizeni ama-castables alula kanye nokumba uwoyela.