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   Technical index: 
|              Brand  Item | Alumina-Based FM70 | Bauxite-Based FM70B |  
|   Chemical Composition | Al2O3 | % | 70-77 | 68.00 |  
| SiO2 | % | 22-29 | / |  
| Fe2O3 | %max | 0.10 | 0.60 |  
| CaO+MgO | %max | -- | 0.50 |  
| R2O | %max | 0.50 | 0.50 |  
| Physical  Property | Apparent Porosity   %max | -- | 2.00 |  
| Bulk Density  g/cm³ min | 2.9&2.7 | 2.95 |  Size: standard grain sizes and fines. Packing: different packages available on request |