Graphite Crucible, Graphite Block, Graphite Mold manufacturer / supplier in China, offering Pore Density 8-60ppi Zirconia Ceramic Foam Filter for Casting Industry, Zirconia /Zro2 Porous Ceramic Foam Filter for Steel Alloys Casting Industry, Porous Alumina /Aluminium Oxident /Alo Ceramic Foam Filter for Aluminium Alloys Casting and so on.