| 
          Grade
         | 
          Density
         | 
          Surface
          Area
         | 
          Average Pore Size | 
          Capacitance
         | 
          Resistivity
         | 
| 
          I
         | 
          0.4-0.5
          g/cc
         | 
          ~400
          m2/gram
         | 
          ~60
          nm
         | 
          15
          - 19 F/gram | 
          0.010
          - 0.040 ohm-cm | 
| 
          II
         | 
          0.4-0.5
          g/cc
         | 
          ~600
          m2/gram
         | 
          75-80
          nm
         | 
          28
          - 30 F/gram | 
          0.010
          - 0.040 ohm-cm |