... quantity e.ISO9001:2000 Manufact. We supply diverse model carbon black, for example N220, N330, N550, N660, N339, ... of origin: china4. Standard: GB 3778-20035. Form: black granule or powder6.Process: wet or dry process7. Usage: ... 108~124103~11996`112103~119107~121-------------- --------Heating Loss ≤%2.522221.51.51.5Ash ≤%0.70.70.70.70 ... .5±1.50.5±1.52.2±1.53.7±1.5 Rubber with carbon black N220,N330,N339