We are the leading manufacturer of carbon black in China. We produce series carbon black for rubber and plastic use, such as N121, N219, N220, N234, N326, N330, N339, N375, N550, N660, N762, N774 etc. We have got ISO9001:2000 AND ISO14001��2004 certification. If you are interested in our products, please contact me ��liuhai00007(at)126(dot)com, I will give you professional service.