... N220 N550 N660 1:black powd or granular pignent 2. rubber industry 3.tyres cable ... carbon blacKN220 N330 N550 N6602N220 We supply diverse model carbon black, for example N220, N330, N550, N660, N339, etc. 1. Type ... -43. Place of origin: china4. Standard: GB 3778-20035. Form: black granule or powder6.Process: wet or dry process7. Usage: maily ...