Nebulox™ pellets, an ultra-light alumina insulation aggregate with micro porous cellular structure, have low thermal conductivity and low thermal mass. It is a unique raw material for manufacturing high temperature refractory products up to 1700°C. Nebulox™ pellets are produced in a patented technology which offers great advantages over the conventional raw materials in areas of chemical stability, thermal shock resistance and HSE compliance. Nebulox™ is completely free from fibers and ideal for the manufacturing of insulating refractories both fired and castables.