Dear sir:Let me introduce Shandong Aona Chemical Co.,Ltd , www.sd-aona.com is Our website ,which is a manufacturer of carbon black N220/N330/N550/N660…We also offer Zinc Oxide.we are in carbon black exporting for 6 years, and received great repution for our high quality and competitive price passing ISO9001:2000,ISO14001:2004 certificate.JamesMobilephone::86-15806372350Fax:86-(0)632-7711709Phone : 86-0632-7782003-81