... forming process,to be made into high-strength fiber board .Products are divided into :common,high pure ,high aluminum,zirconium type ... the best insulation performance,with average density, hardness, strength of the highest uniformity ,products can be turning, milling, planing, grinding, drilling, cutting ... -2000; ISO14001-2000,SGS;ROHS;SOSA Standard widely used in all kinds of kilns ceramic fiber board