... conductivity 4.Pink, white 5.ISO,SGS Alumina Ceramic Heating Beads(92%,95%,99%) Properties: Higher density, surface ... operations of pre and postweld heat treatment Special Ceramic is characterized by high strength,high hardness, ... is provided according to your requirement. Shape of Ceramic beads :*Main body bead*Main body bead with hole* ... the north of Shanghai. 95% alumina beads for ceramic pad heater