Type-A Fine-pored S.G.White 1.20 years professional manufacture 2.ISO9001:2008 ... 3.color:white 4.shape:sphere, lump Type A Fine-pored S.G ... diameter: 2. 0-3.0nmSpecific surface: 650-800m2/g,Pore volume: 0.35-0.45ml/gSpecific heat: ... 11.2RH=50%, % ≥29.2RH=90%, % ≥37.6Heat loss%≤1.0pH Value 4Specific resistanceΩ.cm≥5630Silicon dioxide content%≥ 98.5Percent ...